From d94f7d1b2ef6c56fc7bf39011c3221f5b63d08ba Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Thu, 1 Dec 2022 12:41:15 -0500
Subject: [PATCH 01/50] add alias snippet and unit test

---
 .../snippets/src/main/java/AddAlias.java      | 72 +++++++++++++++++++
 .../snippets/src/test/java/BaseTest.java      |  4 ++
 .../snippets/src/test/java/TestAddAlias.java  | 28 ++++++++
 3 files changed, 104 insertions(+)
 create mode 100644 classroom/snippets/src/main/java/AddAlias.java
 create mode 100644 classroom/snippets/src/test/java/TestAddAlias.java

diff --git a/classroom/snippets/src/main/java/AddAlias.java b/classroom/snippets/src/main/java/AddAlias.java
new file mode 100644
index 00000000..1a81ba9d
--- /dev/null
+++ b/classroom/snippets/src/main/java/AddAlias.java
@@ -0,0 +1,72 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_add_alias]
+
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.CourseAlias;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate the use of Classroom Create Alias API */
+public class AddAlias {
+  /**
+   * Create an aliases for an existing course.
+   *
+   * @param courseId - id of the course to add an alias to.
+   * @return - newly created course alias.
+   * @throws IOException - if credentials file not found.
+   */
+  public static CourseAlias addCourseAlias(String courseId) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+       TODO(developer) - See https://developers.google.com/identity for
+        guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSES));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    CourseAlias courseAlias = null;
+    try {
+      // Create new CourseAlias object
+      CourseAlias content = new CourseAlias()
+          .setAlias("p:test_alias_2");
+      courseAlias = service.courses().aliases().create(courseId, content)
+          .execute();
+      System.out.printf("Course alias created: %s \n", courseAlias.getAlias());
+    } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    return courseAlias;
+  }
+}
+// [END classroom_add_alias]
diff --git a/classroom/snippets/src/test/java/BaseTest.java b/classroom/snippets/src/test/java/BaseTest.java
index c1e46717..cc3996de 100644
--- a/classroom/snippets/src/test/java/BaseTest.java
+++ b/classroom/snippets/src/test/java/BaseTest.java
@@ -80,6 +80,10 @@ public CourseAlias createAlias(String courseId) throws IOException {
   }
 
   public void deleteCourse(String courseId) throws IOException {
+    // updating the course state to be archived so the course can be deleted.
+    Course course = service.courses().get(courseId).execute();
+    course.setCourseState("ARCHIVED");
+    this.service.courses().update(courseId, course).execute();
     this.service.courses().delete(courseId).execute();
   }
 }
diff --git a/classroom/snippets/src/test/java/TestAddAlias.java b/classroom/snippets/src/test/java/TestAddAlias.java
new file mode 100644
index 00000000..3551c638
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestAddAlias.java
@@ -0,0 +1,28 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.CourseAlias;
+import java.io.IOException;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for Add Alias classroom snippet
+public class TestAddAlias extends BaseTest {
+
+  @Test
+  public void testAddAlias() throws IOException {
+    CourseAlias courseAlias = AddAlias.addCourseAlias(testCourse.getId());
+    Assert.assertNotNull("Course alias not returned.", courseAlias);
+  }
+}
\ No newline at end of file

From abd08eca60aad6409d0ac91a9047ee1e8d9f1772 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Thu, 1 Dec 2022 18:04:14 -0500
Subject: [PATCH 02/50] java snippets for topics, create coursework, create
 alias

---
 .../snippets/src/main/java/CreateAlias.java   | 75 ++++++++++++++++
 .../src/main/java/CreateCourseWork.java       | 72 +++++++++++++++
 .../snippets/src/main/java/CreateTopic.java   | 69 +++++++++++++++
 .../snippets/src/main/java/DeleteTopic.java   | 64 ++++++++++++++
 .../snippets/src/main/java/GetTopic.java      | 68 +++++++++++++++
 .../snippets/src/main/java/ListTopics.java    | 87 +++++++++++++++++++
 .../snippets/src/main/java/UpdateTopic.java   | 71 +++++++++++++++
 .../src/test/java/TestCreateAlias.java        | 29 +++++++
 .../src/test/java/TestCreateCourseWork.java   | 28 ++++++
 .../src/test/java/TestCreateTopic.java        | 28 ++++++
 .../src/test/java/TestDeleteTopic.java        | 15 ++++
 .../snippets/src/test/java/TestGetTopic.java  | 31 +++++++
 .../src/test/java/TestListTopics.java         | 31 +++++++
 .../src/test/java/TestUpdateTopic.java        | 28 ++++++
 14 files changed, 696 insertions(+)
 create mode 100644 classroom/snippets/src/main/java/CreateAlias.java
 create mode 100644 classroom/snippets/src/main/java/CreateCourseWork.java
 create mode 100644 classroom/snippets/src/main/java/CreateTopic.java
 create mode 100644 classroom/snippets/src/main/java/DeleteTopic.java
 create mode 100644 classroom/snippets/src/main/java/GetTopic.java
 create mode 100644 classroom/snippets/src/main/java/ListTopics.java
 create mode 100644 classroom/snippets/src/main/java/UpdateTopic.java
 create mode 100644 classroom/snippets/src/test/java/TestCreateAlias.java
 create mode 100644 classroom/snippets/src/test/java/TestCreateCourseWork.java
 create mode 100644 classroom/snippets/src/test/java/TestCreateTopic.java
 create mode 100644 classroom/snippets/src/test/java/TestDeleteTopic.java
 create mode 100644 classroom/snippets/src/test/java/TestGetTopic.java
 create mode 100644 classroom/snippets/src/test/java/TestListTopics.java
 create mode 100644 classroom/snippets/src/test/java/TestUpdateTopic.java

diff --git a/classroom/snippets/src/main/java/CreateAlias.java b/classroom/snippets/src/main/java/CreateAlias.java
new file mode 100644
index 00000000..3ccd7660
--- /dev/null
+++ b/classroom/snippets/src/main/java/CreateAlias.java
@@ -0,0 +1,75 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_create_alias]
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.Course;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate how to create a course with an alias. */
+public class CreateAlias {
+  /**
+   * Create a new course with an alias. Set the new course id to the desired alias.
+   *
+   * @return - newly created course.
+   * @throws IOException - if credentials file not found.
+   */
+  public static Course createAlias() throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+       TODO(developer) - See https://developers.google.com/identity for
+        guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSES));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    Course course = null;
+    try {
+      // Create the new Course
+      Course content = new Course()
+          .setId("p:history_4_2022")
+          .setName("9th Grade History")
+          .setSection("Period 4")
+          .setDescriptionHeading("Welcome to 9th Grade History.")
+          .setOwnerId("me")
+          .setCourseState("PROVISIONED");
+      course = service.courses().create(content).execute();
+      // Prints the new created course id and name
+      System.out.printf("Course created: %s (%s)\n", course.getName(), course.getId());
+    } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    return course;
+  }
+}
+// [END classroom_create_alias]
diff --git a/classroom/snippets/src/main/java/CreateCourseWork.java b/classroom/snippets/src/main/java/CreateCourseWork.java
new file mode 100644
index 00000000..94291230
--- /dev/null
+++ b/classroom/snippets/src/main/java/CreateCourseWork.java
@@ -0,0 +1,72 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_create_coursework]
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.CourseWork;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate the use of Classroom Create CourseWork API. */
+public class CreateCourseWork {
+  /**
+   * Creates course work.
+   *
+   * @param courseId - id of the course to create coursework in.
+   * @return - newly created CourseWork object
+   * @throws IOException - if credentials file not found.
+   */
+  public static CourseWork createCourseWork(String courseId) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+       TODO(developer) - See https://developers.google.com/identity for
+        guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    CourseWork courseWork = null;
+    try {
+      // Create new CourseWork object
+      CourseWork content = new CourseWork()
+          .setTitle("Midterm Quiz")
+          .setWorkType("ASSIGNMENT")
+          .setState("PUBLISHED");
+      courseWork = service.courses().courseWork().create(courseId, content)
+          .execute();
+    } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    return courseWork;
+  }
+}
+// [END classroom_create_coursework]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/CreateTopic.java b/classroom/snippets/src/main/java/CreateTopic.java
new file mode 100644
index 00000000..a7bf7e68
--- /dev/null
+++ b/classroom/snippets/src/main/java/CreateTopic.java
@@ -0,0 +1,69 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_create_topic]
+
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.Topic;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate how to create a topic. */
+public class CreateTopic {
+  /**
+   * Create a new topic in a course.
+   *
+   * @param courseId - the id of the course to create a topic in.
+   * @return - newly created topic.
+   * @throws IOException - if credentials file not found.
+   */
+  public static Topic createTopic(String courseId) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+       TODO(developer) - See https://developers.google.com/identity for
+        guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    Topic topic = null;
+    try {
+      // Create the new Topic
+      Topic content = new Topic().setName("Semester 1");
+      topic = service.courses().topics().create(courseId, content).execute();
+      System.out.println("Topic id: " + topic.getTopicId() + "\n" + "Course id: " + courseId);
+    } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    return topic;
+  }
+}
diff --git a/classroom/snippets/src/main/java/DeleteTopic.java b/classroom/snippets/src/main/java/DeleteTopic.java
new file mode 100644
index 00000000..eddd2f5c
--- /dev/null
+++ b/classroom/snippets/src/main/java/DeleteTopic.java
@@ -0,0 +1,64 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_delete_topic]
+
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate how to delete a topic. */
+public class DeleteTopic {
+  /**
+   * Delete a topic in a course.
+   *
+   * @param courseId - the id of the course where the topic belongs.
+   * @param topicId - the id of the topic to delete.
+   * @return - updated topic.
+   * @throws IOException - if credentials file not found.
+   */
+  public static void deleteTopic(String courseId, String topicId) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    try {
+      service.courses().topics().delete(courseId, topicId).execute();
+    } catch (GoogleJsonResponseException e) {
+      // TODO(developer) - handle error appropriately
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+  }
+}
diff --git a/classroom/snippets/src/main/java/GetTopic.java b/classroom/snippets/src/main/java/GetTopic.java
new file mode 100644
index 00000000..d40eb533
--- /dev/null
+++ b/classroom/snippets/src/main/java/GetTopic.java
@@ -0,0 +1,68 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_get_topic]
+
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.Topic;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate how to get a topic. */
+public class GetTopic {
+  /**
+   * Get a topic in a course.
+   *
+   * @param courseId - the id of the course the topic belongs to.
+   * @param topicId - the id of the topic to retrieve.
+   * @return - the topic to retrieve.
+   * @throws IOException - if credentials file not found.
+   */
+  public static Topic getTopic(String courseId, String topicId) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    Topic topic = null;
+    try {
+      // Get the topic
+      topic = service.courses().topics().get(courseId, topicId).execute();
+    } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    return topic;
+  }
+}
diff --git a/classroom/snippets/src/main/java/ListTopics.java b/classroom/snippets/src/main/java/ListTopics.java
new file mode 100644
index 00000000..8dd7efd1
--- /dev/null
+++ b/classroom/snippets/src/main/java/ListTopics.java
@@ -0,0 +1,87 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_list_topic]
+
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.ListTopicResponse;
+import com.google.api.services.classroom.model.Topic;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/* Class to demonstrate how to list topics in a course. */
+public class ListTopics {
+  /**
+   * List topics in a course.
+   *
+   * @param courseId - the id of the course to retrieve topics for.
+   * @return - the list of topics in the course that the caller is permitted to view.
+   * @throws IOException - if credentials file not found.
+   */
+  public static List<Topic> listTopics(String courseId) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    List<Topic> topics = new ArrayList<>();
+    String pageToken = null;
+
+    try {
+      do {
+        ListTopicResponse response = service.courses().topics().list(courseId)
+            .setPageSize(100)
+            .setPageToken(pageToken)
+            .execute();
+        topics.addAll(response.getTopic());
+        pageToken = response.getNextPageToken();
+      } while (pageToken != null);
+
+      if (topics.isEmpty()) {
+        System.out.println("No topics found.");
+      } else {
+        for (Topic topic : topics) {
+          System.out.printf("%s (%s)\n", topic.getName(), topic.getTopicId());
+        }
+      }
+    } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    return topics;
+  }
+
+}
diff --git a/classroom/snippets/src/main/java/UpdateTopic.java b/classroom/snippets/src/main/java/UpdateTopic.java
new file mode 100644
index 00000000..8278c76d
--- /dev/null
+++ b/classroom/snippets/src/main/java/UpdateTopic.java
@@ -0,0 +1,71 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_update_topic]
+
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.Topic;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate how to update one or more fields in a topic. */
+public class UpdateTopic {
+  /**
+   * Update one or more fields in a topic in a course.
+   *
+   * @param courseId - the id of the course where the topic belongs.
+   * @param topicId - the id of the topic to update.
+   * @return - updated topic.
+   * @throws IOException - if credentials file not found.
+   */
+  public static Topic updateTopic(String courseId, String topicId) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    Topic topic = null;
+    try {
+      Topic topicToUpdate = service.courses().topics().get(courseId, topicId).execute();
+      topicToUpdate.setName("Semester 2");
+      topic = service.courses().topics().patch(courseId, topicId, topicToUpdate)
+          .set("updateMask", "name")
+          .execute();
+    } catch(GoogleJsonResponseException e) {
+      // TODO(developer) - handle error appropriately
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    return topic;
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestCreateAlias.java b/classroom/snippets/src/test/java/TestCreateAlias.java
new file mode 100644
index 00000000..e1aa8813
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestCreateAlias.java
@@ -0,0 +1,29 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.Course;
+import java.io.IOException;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for Create Alias classroom snippet
+public class TestCreateAlias extends BaseTest {
+
+  @Test
+  public void testCreateAlias() throws IOException {
+    Course course = CreateAlias.createAlias();
+    Assert.assertNotNull("Course not returned.", course);
+    deleteCourse(course.getId());
+  }
+}
\ No newline at end of file
diff --git a/classroom/snippets/src/test/java/TestCreateCourseWork.java b/classroom/snippets/src/test/java/TestCreateCourseWork.java
new file mode 100644
index 00000000..e3a25b6b
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestCreateCourseWork.java
@@ -0,0 +1,28 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.CourseWork;
+import java.io.IOException;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for Create Coursework classroom snippet
+public class TestCreateCourseWork extends BaseTest {
+
+  @Test
+  public void testCreateCoursework() throws IOException {
+    CourseWork courseWork = CreateCourseWork.createCourseWork(testCourse.getId());
+    Assert.assertNotNull("Coursework not returned.", courseWork);
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestCreateTopic.java b/classroom/snippets/src/test/java/TestCreateTopic.java
new file mode 100644
index 00000000..e2d77586
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestCreateTopic.java
@@ -0,0 +1,28 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.Topic;
+import java.io.IOException;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for Create Topic classroom snippet
+public class TestCreateTopic extends BaseTest {
+
+  @Test
+  public void testCreateTopic() throws IOException {
+    Topic topic = CreateTopic.createTopic(testCourse.getId());
+    Assert.assertNotNull("Topic not returned.", topic);
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestDeleteTopic.java b/classroom/snippets/src/test/java/TestDeleteTopic.java
new file mode 100644
index 00000000..03cb77f4
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestDeleteTopic.java
@@ -0,0 +1,15 @@
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.services.classroom.model.Topic;
+import java.io.IOException;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestDeleteTopic extends BaseTest {
+  @Test
+  public void testDeleteTopic() throws IOException {
+    Topic topic = CreateTopic.createTopic(testCourse.getId());
+    DeleteTopic.deleteTopic(testCourse.getId(), topic.getTopicId());
+    Assert.assertThrows(GoogleJsonResponseException.class,
+        () -> GetTopic.getTopic(testCourse.getId(), topic.getTopicId()));
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestGetTopic.java b/classroom/snippets/src/test/java/TestGetTopic.java
new file mode 100644
index 00000000..b7cb7840
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestGetTopic.java
@@ -0,0 +1,31 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.Topic;
+import java.io.IOException;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for Get Topic classroom snippet
+public class TestGetTopic extends BaseTest {
+
+  @Test
+  public void testGetTopic() throws IOException {
+    Topic topic = CreateTopic.createTopic(testCourse.getId());
+    Topic getTopic = GetTopic.getTopic(testCourse.getId(), topic.getTopicId());
+    Assert.assertNotNull("Topic could not be created.", topic);
+    Assert.assertNotNull("Topic could not be retrieved.", getTopic);
+    Assert.assertEquals("Wrong topic was retrieved.", topic, getTopic);
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestListTopics.java b/classroom/snippets/src/test/java/TestListTopics.java
new file mode 100644
index 00000000..081be57b
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestListTopics.java
@@ -0,0 +1,31 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.Topic;
+import java.io.IOException;
+import java.util.List;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for List Topics classroom snippet
+public class TestListTopics extends BaseTest {
+
+  @Test
+  public void testListTopics() throws IOException {
+    CreateTopic.createTopic(testCourse.getId());
+    List<Topic> listTopics = ListTopics.listTopics(testCourse.getId());
+    Assert.assertNotNull("Topics could not be retrieved.", listTopics);
+    Assert.assertFalse("No topics were retrieved.", listTopics.size() == 0);
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestUpdateTopic.java b/classroom/snippets/src/test/java/TestUpdateTopic.java
new file mode 100644
index 00000000..5b1b9eec
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestUpdateTopic.java
@@ -0,0 +1,28 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+import com.google.api.services.classroom.model.Topic;
+import java.io.IOException;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for Update Topic classroom snippet
+public class TestUpdateTopic extends BaseTest {
+  @Test
+  public void testUpdateTopic() throws IOException {
+    Topic topic = CreateTopic.createTopic(testCourse.getId());
+    System.out.println("New topic created: " + topic.getName());
+    Topic updatedTopic = UpdateTopic.updateTopic(testCourse.getId(), topic.getTopicId());
+    Assert.assertNotEquals("Topic name was not updated.", topic.getName(), updatedTopic.getName());
+  }
+}

From ac9b45805ca6caa318a4337d49b6299d2977264a Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 6 Dec 2022 14:43:30 -0500
Subject: [PATCH 03/50] updates based on team review

---
 .../snippets/src/main/java/AddAlias.java      | 22 +++++++----
 .../snippets/src/main/java/CreateAlias.java   | 29 ++++++++++-----
 .../src/main/java/CreateCourseWork.java       | 37 +++++++++++++++++--
 .../snippets/src/main/java/CreateTopic.java   | 12 ++++--
 .../snippets/src/main/java/DeleteTopic.java   | 10 ++++-
 .../snippets/src/main/java/GetTopic.java      | 12 ++++--
 .../snippets/src/main/java/ListTopics.java    | 10 ++++-
 .../snippets/src/main/java/UpdateTopic.java   | 16 +++++++-
 8 files changed, 116 insertions(+), 32 deletions(-)

diff --git a/classroom/snippets/src/main/java/AddAlias.java b/classroom/snippets/src/main/java/AddAlias.java
index 1a81ba9d..42c8d883 100644
--- a/classroom/snippets/src/main/java/AddAlias.java
+++ b/classroom/snippets/src/main/java/AddAlias.java
@@ -15,6 +15,7 @@
 
 // [START classroom_add_alias]
 
+import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
@@ -27,10 +28,10 @@
 import java.io.IOException;
 import java.util.Collections;
 
-/* Class to demonstrate the use of Classroom Create Alias API */
+/* Class to demonstrate the use of Classroom Create Alias API. */
 public class AddAlias {
   /**
-   * Create an aliases for an existing course.
+   * Add an alias on an existing course.
    *
    * @param courseId - id of the course to add an alias to.
    * @return - newly created course alias.
@@ -45,24 +46,31 @@ public static CourseAlias addCourseAlias(String courseId) throws IOException {
     HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
         credentials);
 
-    // Create the classroom API client
+    // Create the classroom API client.
     Classroom service = new Classroom.Builder(new NetHttpTransport(),
         GsonFactory.getDefaultInstance(),
         requestInitializer)
         .setApplicationName("Classroom samples")
         .build();
 
+    /* Create a new CourseAlias object with a project-wide alias. Project-wide aliases use a prefix
+    of "p:" and can only be seen and used by the application that created them. */
+    CourseAlias content = new CourseAlias()
+        .setAlias("p:biology_10");
     CourseAlias courseAlias = null;
+
     try {
-      // Create new CourseAlias object
-      CourseAlias content = new CourseAlias()
-          .setAlias("p:test_alias_2");
       courseAlias = service.courses().aliases().create(courseId, content)
           .execute();
       System.out.printf("Course alias created: %s \n", courseAlias.getAlias());
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
-      throw e;
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 409) {
+        System.out.printf("The course alias already exists: %s.\n", content);
+      } else {
+        throw e;
+      }
     } catch (Exception e) {
       throw e;
     }
diff --git a/classroom/snippets/src/main/java/CreateAlias.java b/classroom/snippets/src/main/java/CreateAlias.java
index 3ccd7660..bc50f0f8 100644
--- a/classroom/snippets/src/main/java/CreateAlias.java
+++ b/classroom/snippets/src/main/java/CreateAlias.java
@@ -14,6 +14,7 @@
 
 
 // [START classroom_create_alias]
+import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
@@ -43,7 +44,7 @@ public static Course createAlias() throws IOException {
     HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
         credentials);
 
-    // Create the classroom API client
+    // Create the classroom API client.
     Classroom service = new Classroom.Builder(new NetHttpTransport(),
         GsonFactory.getDefaultInstance(),
         requestInitializer)
@@ -51,21 +52,29 @@ public static Course createAlias() throws IOException {
         .build();
 
     Course course = null;
+
+    /* Create a new Course with the alias set as the id field. Project-wide aliases use a prefix
+    of "p:" and can only be seen and used by the application that created them. */
+    Course content = new Course()
+        .setId("p:history_4_2022")
+        .setName("9th Grade History")
+        .setSection("Period 4")
+        .setDescriptionHeading("Welcome to 9th Grade History.")
+        .setOwnerId("me")
+        .setCourseState("PROVISIONED");
+
     try {
-      // Create the new Course
-      Course content = new Course()
-          .setId("p:history_4_2022")
-          .setName("9th Grade History")
-          .setSection("Period 4")
-          .setDescriptionHeading("Welcome to 9th Grade History.")
-          .setOwnerId("me")
-          .setCourseState("PROVISIONED");
       course = service.courses().create(content).execute();
       // Prints the new created course id and name
       System.out.printf("Course created: %s (%s)\n", course.getName(), course.getId());
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
-      throw e;
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 409) {
+        System.out.printf("The course alias already exists: %s.\n", content.getId());
+      } else {
+        throw e;
+      }
     } catch (Exception e) {
       throw e;
     }
diff --git a/classroom/snippets/src/main/java/CreateCourseWork.java b/classroom/snippets/src/main/java/CreateCourseWork.java
index 94291230..11dfab7f 100644
--- a/classroom/snippets/src/main/java/CreateCourseWork.java
+++ b/classroom/snippets/src/main/java/CreateCourseWork.java
@@ -14,6 +14,7 @@
 
 
 // [START classroom_create_coursework]
+import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
@@ -21,10 +22,16 @@
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.CourseWork;
+import com.google.api.services.classroom.model.Date;
+import com.google.api.services.classroom.model.Link;
+import com.google.api.services.classroom.model.Material;
+import com.google.api.services.classroom.model.TimeOfDay;
 import com.google.auth.http.HttpCredentialsAdapter;
 import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
+import java.util.Arrays;
 import java.util.Collections;
+import java.util.List;
 
 /* Class to demonstrate the use of Classroom Create CourseWork API. */
 public class CreateCourseWork {
@@ -44,7 +51,7 @@ public static CourseWork createCourseWork(String courseId) throws IOException {
     HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
         credentials);
 
-    // Create the classroom API client
+    // Create the classroom API client.
     Classroom service = new Classroom.Builder(new NetHttpTransport(),
         GsonFactory.getDefaultInstance(),
         requestInitializer)
@@ -53,15 +60,39 @@ public static CourseWork createCourseWork(String courseId) throws IOException {
 
     CourseWork courseWork = null;
     try {
-      // Create new CourseWork object
+      // Create a link to add as a material on course work.
+      Link articleLink = new Link()
+          .setTitle("SR-71 Blackbird")
+          .setUrl("https://www.lockheedmartin.com/en-us/news/features/history/blackbird.html");
+
+      // Create a list of Materials to add to course work.
+      List<Material> materials = Arrays.asList(new Material().setLink(articleLink));
+
+      /* Create new CourseWork object with the material attached.
+      Set workType to `ASSIGNMENT`. Possible values of workType can be found here:
+      https://developers.google.com/classroom/reference/rest/v1/CourseWorkType
+      Set state to `PUBLISHED`. Possible values of state can be found here:
+      https://developers.google.com/classroom/reference/rest/v1/courses.courseWork#courseworkstate */
       CourseWork content = new CourseWork()
-          .setTitle("Midterm Quiz")
+          .setTitle("Supersonic aviation")
+          .setDescription("Read about how the SR-71 Blackbird, the world’s fastest and "
+              + "highest-flying manned aircraft, was built.")
+          .setMaterials(materials)
+          .setDueDate(new Date().setMonth(12).setDay(10).setYear(2022))
+          .setDueTime(new TimeOfDay().setHours(15).setMinutes(0))
           .setWorkType("ASSIGNMENT")
           .setState("PUBLISHED");
+
       courseWork = service.courses().courseWork().create(courseId, content)
           .execute();
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId does not exist: %s.\n", courseId);
+      } else {
+        throw e;
+      }
       throw e;
     } catch (Exception e) {
       throw e;
diff --git a/classroom/snippets/src/main/java/CreateTopic.java b/classroom/snippets/src/main/java/CreateTopic.java
index a7bf7e68..ce8e61f7 100644
--- a/classroom/snippets/src/main/java/CreateTopic.java
+++ b/classroom/snippets/src/main/java/CreateTopic.java
@@ -15,6 +15,7 @@
 
 // [START classroom_create_topic]
 
+import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
@@ -45,7 +46,7 @@ public static Topic createTopic(String courseId) throws IOException {
     HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
         credentials);
 
-    // Create the classroom API client
+    // Create the classroom API client.
     Classroom service = new Classroom.Builder(new NetHttpTransport(),
         GsonFactory.getDefaultInstance(),
         requestInitializer)
@@ -54,13 +55,18 @@ public static Topic createTopic(String courseId) throws IOException {
 
     Topic topic = null;
     try {
-      // Create the new Topic
+      // Create the new Topic.
       Topic content = new Topic().setName("Semester 1");
       topic = service.courses().topics().create(courseId, content).execute();
       System.out.println("Topic id: " + topic.getTopicId() + "\n" + "Course id: " + courseId);
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
-      throw e;
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId does not exist: %s.\n", courseId);
+      } else {
+        throw e;
+      }
     } catch (Exception e) {
       throw e;
     }
diff --git a/classroom/snippets/src/main/java/DeleteTopic.java b/classroom/snippets/src/main/java/DeleteTopic.java
index eddd2f5c..fab242c9 100644
--- a/classroom/snippets/src/main/java/DeleteTopic.java
+++ b/classroom/snippets/src/main/java/DeleteTopic.java
@@ -15,6 +15,7 @@
 
 // [START classroom_delete_topic]
 
+import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
@@ -45,7 +46,7 @@ public static void deleteTopic(String courseId, String topicId) throws IOExcepti
     HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
         credentials);
 
-    // Create the classroom API client
+    // Create the classroom API client.
     Classroom service = new Classroom.Builder(new NetHttpTransport(),
         GsonFactory.getDefaultInstance(),
         requestInitializer)
@@ -56,7 +57,12 @@ public static void deleteTopic(String courseId, String topicId) throws IOExcepti
       service.courses().topics().delete(courseId, topicId).execute();
     } catch (GoogleJsonResponseException e) {
       // TODO(developer) - handle error appropriately
-      throw e;
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId or topicId does not exist: %s, %s.\n", courseId, topicId);
+      } else {
+        throw e;
+      }
     } catch (Exception e) {
       throw e;
     }
diff --git a/classroom/snippets/src/main/java/GetTopic.java b/classroom/snippets/src/main/java/GetTopic.java
index d40eb533..5ffe87b4 100644
--- a/classroom/snippets/src/main/java/GetTopic.java
+++ b/classroom/snippets/src/main/java/GetTopic.java
@@ -15,6 +15,7 @@
 
 // [START classroom_get_topic]
 
+import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
@@ -46,7 +47,7 @@ public static Topic getTopic(String courseId, String topicId) throws IOException
     HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
         credentials);
 
-    // Create the classroom API client
+    // Create the classroom API client.
     Classroom service = new Classroom.Builder(new NetHttpTransport(),
         GsonFactory.getDefaultInstance(),
         requestInitializer)
@@ -55,11 +56,16 @@ public static Topic getTopic(String courseId, String topicId) throws IOException
 
     Topic topic = null;
     try {
-      // Get the topic
+      // Get the topic.
       topic = service.courses().topics().get(courseId, topicId).execute();
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
-      throw e;
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId or topicId does not exist: %s, %s.\n", courseId, topicId);
+      } else {
+        throw e;
+      }
     } catch (Exception e) {
       throw e;
     }
diff --git a/classroom/snippets/src/main/java/ListTopics.java b/classroom/snippets/src/main/java/ListTopics.java
index 8dd7efd1..ffed9712 100644
--- a/classroom/snippets/src/main/java/ListTopics.java
+++ b/classroom/snippets/src/main/java/ListTopics.java
@@ -15,6 +15,7 @@
 
 // [START classroom_list_topic]
 
+import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
@@ -48,7 +49,7 @@ public static List<Topic> listTopics(String courseId) throws IOException {
     HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
         credentials);
 
-    // Create the classroom API client
+    // Create the classroom API client.
     Classroom service = new Classroom.Builder(new NetHttpTransport(),
         GsonFactory.getDefaultInstance(),
         requestInitializer)
@@ -77,7 +78,12 @@ public static List<Topic> listTopics(String courseId) throws IOException {
       }
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
-      throw e;
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId does not exist: %s.\n", courseId);
+      } else {
+        throw e;
+      }
     } catch (Exception e) {
       throw e;
     }
diff --git a/classroom/snippets/src/main/java/UpdateTopic.java b/classroom/snippets/src/main/java/UpdateTopic.java
index 8278c76d..49bde0c0 100644
--- a/classroom/snippets/src/main/java/UpdateTopic.java
+++ b/classroom/snippets/src/main/java/UpdateTopic.java
@@ -15,6 +15,7 @@
 
 // [START classroom_update_topic]
 
+import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
@@ -46,7 +47,7 @@ public static Topic updateTopic(String courseId, String topicId) throws IOExcept
     HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
         credentials);
 
-    // Create the classroom API client
+    // Create the classroom API client.
     Classroom service = new Classroom.Builder(new NetHttpTransport(),
         GsonFactory.getDefaultInstance(),
         requestInitializer)
@@ -55,14 +56,25 @@ public static Topic updateTopic(String courseId, String topicId) throws IOExcept
 
     Topic topic = null;
     try {
+      // Retrieve the topic to update.
       Topic topicToUpdate = service.courses().topics().get(courseId, topicId).execute();
+
+      // Update the name field for the topic retrieved.
       topicToUpdate.setName("Semester 2");
+
+      /* Call the patch endpoint and set the updateMask query parameter to the field that needs to
+       be updated. */
       topic = service.courses().topics().patch(courseId, topicId, topicToUpdate)
           .set("updateMask", "name")
           .execute();
     } catch(GoogleJsonResponseException e) {
       // TODO(developer) - handle error appropriately
-      throw e;
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId or topicId does not exist: %s, %s.\n", courseId, topicId);
+      } else {
+        throw e;
+      }
     } catch (Exception e) {
       throw e;
     }

From a5cbd302d230e45b72d45e5af108b5f531b63b53 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Fri, 9 Dec 2022 13:38:10 -0500
Subject: [PATCH 04/50] renamed alias methods, added devsite comments

---
 .../java/{AddAlias.java => AddAliasToCourse.java}   | 13 +++++++++----
 ...{CreateAlias.java => CreateCourseWithAlias.java} | 13 +++++++++----
 .../snippets/src/main/java/CreateCourseWork.java    | 10 +++++++---
 classroom/snippets/src/main/java/CreateTopic.java   |  8 +++++++-
 classroom/snippets/src/main/java/DeleteTopic.java   |  8 +++++++-
 classroom/snippets/src/main/java/GetTopic.java      |  8 +++++++-
 classroom/snippets/src/main/java/ListTopics.java    |  9 +++++++--
 classroom/snippets/src/main/java/UpdateTopic.java   |  8 +++++++-
 ...{TestAddAlias.java => TestAddAliasToCourse.java} | 12 +++++++++---
 ...ateAlias.java => TestCreateCourseWithAlias.java} | 13 ++++++++++---
 10 files changed, 79 insertions(+), 23 deletions(-)
 rename classroom/snippets/src/main/java/{AddAlias.java => AddAliasToCourse.java} (90%)
 rename classroom/snippets/src/main/java/{CreateAlias.java => CreateCourseWithAlias.java} (90%)
 rename classroom/snippets/src/test/java/{TestAddAlias.java => TestAddAliasToCourse.java} (66%)
 rename classroom/snippets/src/test/java/{TestCreateAlias.java => TestCreateCourseWithAlias.java} (64%)

diff --git a/classroom/snippets/src/main/java/AddAlias.java b/classroom/snippets/src/main/java/AddAliasToCourse.java
similarity index 90%
rename from classroom/snippets/src/main/java/AddAlias.java
rename to classroom/snippets/src/main/java/AddAliasToCourse.java
index 42c8d883..10434391 100644
--- a/classroom/snippets/src/main/java/AddAlias.java
+++ b/classroom/snippets/src/main/java/AddAliasToCourse.java
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 
-// [START classroom_add_alias]
+// [START classroom_add_alias_to_course_class]
 
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
@@ -29,7 +29,7 @@
 import java.util.Collections;
 
 /* Class to demonstrate the use of Classroom Create Alias API. */
-public class AddAlias {
+public class AddAliasToCourse {
   /**
    * Add an alias on an existing course.
    *
@@ -37,7 +37,7 @@ public class AddAlias {
    * @return - newly created course alias.
    * @throws IOException - if credentials file not found.
    */
-  public static CourseAlias addCourseAlias(String courseId) throws IOException {
+  public static CourseAlias addAliasToCourse(String courseId) throws IOException {
     /* Load pre-authorized user credentials from the environment.
        TODO(developer) - See https://developers.google.com/identity for
         guides on implementing OAuth2 for your application. */
@@ -53,6 +53,8 @@ public static CourseAlias addCourseAlias(String courseId) throws IOException {
         .setApplicationName("Classroom samples")
         .build();
 
+    // [START classroom_add_alias_to_course_code_snippet]
+
     /* Create a new CourseAlias object with a project-wide alias. Project-wide aliases use a prefix
     of "p:" and can only be seen and used by the application that created them. */
     CourseAlias content = new CourseAlias()
@@ -75,6 +77,9 @@ public static CourseAlias addCourseAlias(String courseId) throws IOException {
       throw e;
     }
     return courseAlias;
+
+    // [END classroom_add_alias_to_course_code_snippet]
+
   }
 }
-// [END classroom_add_alias]
+// [END classroom_add_alias_to_course_class]
diff --git a/classroom/snippets/src/main/java/CreateAlias.java b/classroom/snippets/src/main/java/CreateCourseWithAlias.java
similarity index 90%
rename from classroom/snippets/src/main/java/CreateAlias.java
rename to classroom/snippets/src/main/java/CreateCourseWithAlias.java
index bc50f0f8..77a6521b 100644
--- a/classroom/snippets/src/main/java/CreateAlias.java
+++ b/classroom/snippets/src/main/java/CreateCourseWithAlias.java
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 
-// [START classroom_create_alias]
+// [START classroom_create_course_with_alias_class]
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
@@ -28,14 +28,14 @@
 import java.util.Collections;
 
 /* Class to demonstrate how to create a course with an alias. */
-public class CreateAlias {
+public class CreateCourseWithAlias {
   /**
    * Create a new course with an alias. Set the new course id to the desired alias.
    *
    * @return - newly created course.
    * @throws IOException - if credentials file not found.
    */
-  public static Course createAlias() throws IOException {
+  public static Course createCourseWithAlias() throws IOException {
     /* Load pre-authorized user credentials from the environment.
        TODO(developer) - See https://developers.google.com/identity for
         guides on implementing OAuth2 for your application. */
@@ -51,6 +51,8 @@ public static Course createAlias() throws IOException {
         .setApplicationName("Classroom samples")
         .build();
 
+    // [START classroom_create_course_with_alias_code_snippet]
+
     Course course = null;
 
     /* Create a new Course with the alias set as the id field. Project-wide aliases use a prefix
@@ -79,6 +81,9 @@ public static Course createAlias() throws IOException {
       throw e;
     }
     return course;
+
+    // [END classroom_create_course_with_alias_code_snippet]
+
   }
 }
-// [END classroom_create_alias]
+// [END classroom_create_course_with_alias_class]
diff --git a/classroom/snippets/src/main/java/CreateCourseWork.java b/classroom/snippets/src/main/java/CreateCourseWork.java
index 11dfab7f..631ced38 100644
--- a/classroom/snippets/src/main/java/CreateCourseWork.java
+++ b/classroom/snippets/src/main/java/CreateCourseWork.java
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 
-// [START classroom_create_coursework]
+// [START classroom_create_coursework_class]
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
@@ -39,7 +39,7 @@ public class CreateCourseWork {
    * Creates course work.
    *
    * @param courseId - id of the course to create coursework in.
-   * @return - newly created CourseWork object
+   * @return - newly created CourseWork object.
    * @throws IOException - if credentials file not found.
    */
   public static CourseWork createCourseWork(String courseId) throws IOException {
@@ -58,6 +58,8 @@ public static CourseWork createCourseWork(String courseId) throws IOException {
         .setApplicationName("Classroom samples")
         .build();
 
+    // [START classroom_create_coursework_code_snippet]
+
     CourseWork courseWork = null;
     try {
       // Create a link to add as a material on course work.
@@ -98,6 +100,8 @@ public static CourseWork createCourseWork(String courseId) throws IOException {
       throw e;
     }
     return courseWork;
+
+    // [END classroom_create_coursework_code_snippet]
   }
 }
-// [END classroom_create_coursework]
\ No newline at end of file
+// [END classroom_create_coursework_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/CreateTopic.java b/classroom/snippets/src/main/java/CreateTopic.java
index ce8e61f7..a46e573f 100644
--- a/classroom/snippets/src/main/java/CreateTopic.java
+++ b/classroom/snippets/src/main/java/CreateTopic.java
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 
-// [START classroom_create_topic]
+// [START classroom_create_topic_class]
 
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
@@ -53,6 +53,8 @@ public static Topic createTopic(String courseId) throws IOException {
         .setApplicationName("Classroom samples")
         .build();
 
+    // [START classroom_create_topic_code_snippet]
+
     Topic topic = null;
     try {
       // Create the new Topic.
@@ -71,5 +73,9 @@ public static Topic createTopic(String courseId) throws IOException {
       throw e;
     }
     return topic;
+
+    // [END classroom_create_topic_code_snippet]
+
   }
 }
+// [END classroom_create_topic_class]
diff --git a/classroom/snippets/src/main/java/DeleteTopic.java b/classroom/snippets/src/main/java/DeleteTopic.java
index fab242c9..b8ee8f73 100644
--- a/classroom/snippets/src/main/java/DeleteTopic.java
+++ b/classroom/snippets/src/main/java/DeleteTopic.java
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 
-// [START classroom_delete_topic]
+// [START classroom_delete_topic_class]
 
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
@@ -53,6 +53,8 @@ public static void deleteTopic(String courseId, String topicId) throws IOExcepti
         .setApplicationName("Classroom samples")
         .build();
 
+    // [START classroom_delete_topic_code_snippet]
+
     try {
       service.courses().topics().delete(courseId, topicId).execute();
     } catch (GoogleJsonResponseException e) {
@@ -66,5 +68,9 @@ public static void deleteTopic(String courseId, String topicId) throws IOExcepti
     } catch (Exception e) {
       throw e;
     }
+
+    // [END classroom_delete_topic_code_snippet]
+
   }
 }
+// [END classroom_delete_topic_class]
diff --git a/classroom/snippets/src/main/java/GetTopic.java b/classroom/snippets/src/main/java/GetTopic.java
index 5ffe87b4..5332bd5c 100644
--- a/classroom/snippets/src/main/java/GetTopic.java
+++ b/classroom/snippets/src/main/java/GetTopic.java
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 
-// [START classroom_get_topic]
+// [START classroom_get_topic_class]
 
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
@@ -54,6 +54,8 @@ public static Topic getTopic(String courseId, String topicId) throws IOException
         .setApplicationName("Classroom samples")
         .build();
 
+    // [START classroom_get_topic_code_snippet]
+
     Topic topic = null;
     try {
       // Get the topic.
@@ -70,5 +72,9 @@ public static Topic getTopic(String courseId, String topicId) throws IOException
       throw e;
     }
     return topic;
+
+    // [END classroom_get_topic_code_snippet]
+
   }
 }
+// [END classroom_get_topic_class]
diff --git a/classroom/snippets/src/main/java/ListTopics.java b/classroom/snippets/src/main/java/ListTopics.java
index ffed9712..61ea9b89 100644
--- a/classroom/snippets/src/main/java/ListTopics.java
+++ b/classroom/snippets/src/main/java/ListTopics.java
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 
-// [START classroom_list_topic]
+// [START classroom_list_topic_class]
 
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
@@ -56,6 +56,8 @@ public static List<Topic> listTopics(String courseId) throws IOException {
         .setApplicationName("Classroom samples")
         .build();
 
+    // [START classroom_list_topic_code_snippet]
+
     List<Topic> topics = new ArrayList<>();
     String pageToken = null;
 
@@ -88,6 +90,9 @@ public static List<Topic> listTopics(String courseId) throws IOException {
       throw e;
     }
     return topics;
-  }
 
+    // [END classroom_list_topic_code_snippet]
+
+  }
 }
+// [END classroom_list_topic_class]
diff --git a/classroom/snippets/src/main/java/UpdateTopic.java b/classroom/snippets/src/main/java/UpdateTopic.java
index 49bde0c0..770bee30 100644
--- a/classroom/snippets/src/main/java/UpdateTopic.java
+++ b/classroom/snippets/src/main/java/UpdateTopic.java
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 
-// [START classroom_update_topic]
+// [START classroom_update_topic_class]
 
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
@@ -54,6 +54,8 @@ public static Topic updateTopic(String courseId, String topicId) throws IOExcept
         .setApplicationName("Classroom samples")
         .build();
 
+    // [START classroom_update_topic_code_snippet]
+
     Topic topic = null;
     try {
       // Retrieve the topic to update.
@@ -79,5 +81,9 @@ public static Topic updateTopic(String courseId, String topicId) throws IOExcept
       throw e;
     }
     return topic;
+
+    // [END classroom_update_topic_code_snippet]
+
   }
 }
+// [END classroom_update_topic_class]
diff --git a/classroom/snippets/src/test/java/TestAddAlias.java b/classroom/snippets/src/test/java/TestAddAliasToCourse.java
similarity index 66%
rename from classroom/snippets/src/test/java/TestAddAlias.java
rename to classroom/snippets/src/test/java/TestAddAliasToCourse.java
index 3551c638..c5b85777 100644
--- a/classroom/snippets/src/test/java/TestAddAlias.java
+++ b/classroom/snippets/src/test/java/TestAddAliasToCourse.java
@@ -14,15 +14,21 @@
 
 import com.google.api.services.classroom.model.CourseAlias;
 import java.io.IOException;
+import java.util.List;
 import org.junit.Assert;
 import org.junit.Test;
 
 // Unit test class for Add Alias classroom snippet
-public class TestAddAlias extends BaseTest {
+public class TestAddAliasToCourse extends BaseTest {
 
   @Test
-  public void testAddAlias() throws IOException {
-    CourseAlias courseAlias = AddAlias.addCourseAlias(testCourse.getId());
+  public void testAddCourseAlias() throws IOException {
+    CourseAlias courseAlias = AddAliasToCourse.addAliasToCourse(testCourse.getId());
+    List<CourseAlias> courseAliases = service.courses().aliases()
+        .list(testCourse.getId()
+        ).execute()
+        .getAliases();
     Assert.assertNotNull("Course alias not returned.", courseAlias);
+    Assert.assertTrue("No course aliases exist.", courseAliases.size() > 0);
   }
 }
\ No newline at end of file
diff --git a/classroom/snippets/src/test/java/TestCreateAlias.java b/classroom/snippets/src/test/java/TestCreateCourseWithAlias.java
similarity index 64%
rename from classroom/snippets/src/test/java/TestCreateAlias.java
rename to classroom/snippets/src/test/java/TestCreateCourseWithAlias.java
index e1aa8813..5152b984 100644
--- a/classroom/snippets/src/test/java/TestCreateAlias.java
+++ b/classroom/snippets/src/test/java/TestCreateCourseWithAlias.java
@@ -13,17 +13,24 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.Course;
+import com.google.api.services.classroom.model.CourseAlias;
 import java.io.IOException;
+import java.util.List;
 import org.junit.Assert;
 import org.junit.Test;
 
 // Unit test class for Create Alias classroom snippet
-public class TestCreateAlias extends BaseTest {
+public class TestCreateCourseWithAlias extends BaseTest {
 
   @Test
-  public void testCreateAlias() throws IOException {
-    Course course = CreateAlias.createAlias();
+  public void testCreateCourseWithAlias() throws IOException {
+    Course course = CreateCourseWithAlias.createCourseWithAlias();
+    List<CourseAlias> courseAliases = service.courses().aliases()
+        .list(course.getId()
+        ).execute()
+        .getAliases();
     Assert.assertNotNull("Course not returned.", course);
+    Assert.assertTrue("No course aliases exist.", courseAliases.size() > 0);
     deleteCourse(course.getId());
   }
 }
\ No newline at end of file

From f567ffe1e642774418507e602f9372dcdfb0f243 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Fri, 9 Dec 2022 13:59:42 -0500
Subject: [PATCH 05/50] added missing license header to TestDeleteTopic.java

---
 .../snippets/src/test/java/TestDeleteTopic.java    | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/classroom/snippets/src/test/java/TestDeleteTopic.java b/classroom/snippets/src/test/java/TestDeleteTopic.java
index 03cb77f4..b093865c 100644
--- a/classroom/snippets/src/test/java/TestDeleteTopic.java
+++ b/classroom/snippets/src/test/java/TestDeleteTopic.java
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.services.classroom.model.Topic;
 import java.io.IOException;

From e9d825d00c61d59b154cbb4c2727e89b7370a28e Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Fri, 9 Dec 2022 16:22:29 -0500
Subject: [PATCH 06/50] Adding List, ModifyAttachments, Patch, Return
 StudentSubmission methods

---
 .../src/main/java/ListStudentSubmissions.java | 89 ++++++++++++++++++
 .../main/java/ListStudentsSubmissions.java    | 88 ++++++++++++++++++
 .../ModifyAttachmentsStudentSubmission.java   | 92 +++++++++++++++++++
 .../src/main/java/PatchStudentSubmission.java | 89 ++++++++++++++++++
 .../main/java/ReturnStudentSubmission.java    | 79 ++++++++++++++++
 .../java/TestListStudentsSubmissions.java     | 31 +++++++
 6 files changed, 468 insertions(+)
 create mode 100644 classroom/snippets/src/main/java/ListStudentSubmissions.java
 create mode 100644 classroom/snippets/src/main/java/ListStudentsSubmissions.java
 create mode 100644 classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
 create mode 100644 classroom/snippets/src/main/java/PatchStudentSubmission.java
 create mode 100644 classroom/snippets/src/main/java/ReturnStudentSubmission.java
 create mode 100644 classroom/snippets/src/test/java/TestListStudentsSubmissions.java

diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
new file mode 100644
index 00000000..ca9ec5d9
--- /dev/null
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -0,0 +1,89 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_list_student_submissions_class]
+
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.ListStudentSubmissionsResponse;
+import com.google.api.services.classroom.model.StudentSubmission;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/* Class to demonstrate the use of Classroom List StudentSubmissions API. */
+public class ListStudentSubmissions {
+  /**
+   * Lists student submissions based on courseId, courseWorkId, and userId.
+   *
+   * @param courseId - identifier of the course.
+   * @param courseWorkId - identifier of the course work.
+   * @param userId - identifier of the student whose work to return.
+   * @return - list of student submission.
+   * @throws IOException - if credentials file not found.
+   */
+  public static List<StudentSubmission> listStudentSubmissions(String courseId, String courseWorkId,
+      String userId) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client.
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    // [START classroom_list_student_submissions_code_snippet]
+
+    List<StudentSubmission> studentSubmissions = new ArrayList<>();
+    try {
+      // Set the userId as a query parameter on the request.
+      ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
+          .list(courseId, courseWorkId)
+          .set("userId", userId)
+          .execute();
+      studentSubmissions.addAll(response.getStudentSubmissions());
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId (%s), courseWorkId (%s), or userId (%s) does "
+            + "not exist.\n", courseId, courseWorkId, userId);
+      } else {
+        throw e;
+      }
+    } catch (Exception e) {
+      throw e;
+    }
+    return studentSubmissions;
+
+    // [END classroom_list_student_submissions_code_snippet]
+
+  }
+}
+// [END classroom_list_student_submissions_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/ListStudentsSubmissions.java b/classroom/snippets/src/main/java/ListStudentsSubmissions.java
new file mode 100644
index 00000000..2e79ab44
--- /dev/null
+++ b/classroom/snippets/src/main/java/ListStudentsSubmissions.java
@@ -0,0 +1,88 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_list_submissions_class]
+
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.ListStudentSubmissionsResponse;
+import com.google.api.services.classroom.model.StudentSubmission;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/* Class to demonstrate the use of Classroom List StudentSubmissions API. */
+public class ListStudentsSubmissions {
+  /**
+   * Lists students submissions based on courseId and courseWorkId.
+   *
+   * @param courseId - identifier of the course.
+   * @param courseWorkId - identifier of the course work.
+   * @return - list of student submissions.
+   * @throws IOException - if credentials file not found.
+   */
+  public static List<StudentSubmission> listStudentsSubmissions(String courseId, String courseWorkId)
+      throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client.
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    // [START classroom_list_submissions_code_snippet]
+
+    List<StudentSubmission> studentSubmissions = new ArrayList<>();
+    try {
+      ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
+          .list(courseId, courseWorkId)
+          .execute();
+      if (response.getStudentSubmissions() != null) {
+        studentSubmissions.addAll(response.getStudentSubmissions());
+      }
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId (%s) or courseWorkId (%s) (%s) does not exist.\n", courseId,
+            courseWorkId);
+      } else {
+        throw e;
+      }
+    } catch (Exception e) {
+      throw e;
+    }
+    return studentSubmissions;
+
+    // [END classroom_list_submissions_code_snippet]
+
+  }
+}
+// [END classroom_list_submissions_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
new file mode 100644
index 00000000..df3f17da
--- /dev/null
+++ b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
@@ -0,0 +1,92 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_modify_attachments_student_submissions_class]
+
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.Attachment;
+import com.google.api.services.classroom.model.Link;
+import com.google.api.services.classroom.model.ModifyAttachmentsRequest;
+import com.google.api.services.classroom.model.StudentSubmission;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collections;
+
+/* Class to demonstrate the use of Classroom Modify Attachments StudentSubmissions API. */
+public class ModifyAttachmentsStudentSubmission {
+  /**
+   * Lists student submissions based on courseId, courseWorkId, and userId.
+   *
+   * @param courseId - identifier of the course.
+   * @param courseWorkId - identifier of the course work.
+   * @param id - identifier of the student submission.
+   * @return - the modified student submissions.
+   * @throws IOException - if credentials file not found.
+   */
+  public static StudentSubmission modifyAttachments(String courseId, String courseWorkId, String id)
+      throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client.
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    // [START classroom_modify_attachments_student_submissions_code_snippet]
+
+    StudentSubmission studentSubmission = null;
+    try {
+      // Create ModifyAttachmentRequest object that includes a new attachment with a link.
+      Link link = new Link().setUrl("https://en.wikipedia.org/wiki/Irrational_number");
+      Attachment attachment = new Attachment().setLink(link);
+      ModifyAttachmentsRequest modifyAttachmentsRequest = new ModifyAttachmentsRequest()
+          .setAddAttachments(Arrays.asList(attachment));
+      studentSubmission = service.courses().courseWork().studentSubmissions().modifyAttachments(
+          courseId, courseWorkId, id, modifyAttachmentsRequest)
+          .execute();
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "
+            + "not exist.\n", courseId, courseWorkId, id);
+      } else {
+        throw e;
+      }
+    } catch(Exception e) {
+      throw e;
+    }
+    return studentSubmission;
+
+    // [END classroom_modify_attachments_student_submissions_code_snippet]
+
+  }
+}
+// [END classroom_modify_attachments_student_submissions_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/PatchStudentSubmission.java b/classroom/snippets/src/main/java/PatchStudentSubmission.java
new file mode 100644
index 00000000..25ee96c1
--- /dev/null
+++ b/classroom/snippets/src/main/java/PatchStudentSubmission.java
@@ -0,0 +1,89 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_patch_student_submissions_class]
+
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.StudentSubmission;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate the use of Classroom Patch StudentSubmissions API. */
+public class PatchStudentSubmission {
+  /**
+   * Updates one or more fields of a student submission.
+   *
+   * @param courseId - identifier of the course.
+   * @param courseWorkId - identifier of the course work.
+   * @param id - identifier of the student submission.
+   * @return - updated StudentSubmission instance.
+   * @throws IOException - if credentials file not found.
+   */
+  public static StudentSubmission patchStudentSubmission(String courseId, String courseWorkId,
+      String id) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client.
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    // [START classroom_patch_student_submissions_code_snippet]
+
+    StudentSubmission studentSubmission = null;
+    try {
+      //
+      StudentSubmission content = service.courses().courseWork().studentSubmissions()
+          .get(courseId, courseWorkId, id)
+          .execute();
+      content.setAssignedGrade(80.00);
+      content.setDraftGrade(90.00);
+      studentSubmission = service.courses().courseWork().studentSubmissions()
+          .patch(courseId, courseWorkId, id, content)
+          .execute();
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "
+            + "not exist.\n", courseId, courseWorkId, id);
+      } else {
+        throw e;
+      }
+    } catch (Exception e) {
+      throw e;
+    }
+    return studentSubmission;
+
+    // [END classroom_patch_student_submissions_code_snippet]
+
+  }
+}
+// [END classroom_patch_student_submissions_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/ReturnStudentSubmission.java b/classroom/snippets/src/main/java/ReturnStudentSubmission.java
new file mode 100644
index 00000000..38bfcf45
--- /dev/null
+++ b/classroom/snippets/src/main/java/ReturnStudentSubmission.java
@@ -0,0 +1,79 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_return_student_submissions_class]
+
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate the use of Classroom Return StudentSubmissions API. */
+public class ReturnStudentSubmission {
+  /**
+   * Return student submission.
+   *
+   * @param courseId - identifier of the course.
+   * @param courseWorkId - identifier of the course work.
+   * @param id - identifier of the student submission.
+   * @throws IOException - if credentials file not found.
+   */
+  public static void returnSubmission(String courseId, String courseWorkId, String id)
+      throws IOException {
+   /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client.
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    // [START classroom_return_student_submissions_code_snippet]
+
+    try {
+      service.courses().courseWork().studentSubmissions()
+          .classroomReturn(courseId, courseWorkId, id, null)
+          .execute();
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "
+            + "not exist.\n", courseId, courseWorkId, id);
+      } else {
+        throw e;
+      }
+    } catch (Exception e) {
+      throw e;
+    }
+
+    // [END classroom_return_student_submissions_code_snippet]
+
+  }
+}
+// [END classroom_return_student_submissions_class]
diff --git a/classroom/snippets/src/test/java/TestListStudentsSubmissions.java b/classroom/snippets/src/test/java/TestListStudentsSubmissions.java
new file mode 100644
index 00000000..d92a77ca
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestListStudentsSubmissions.java
@@ -0,0 +1,31 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.StudentSubmission;
+import java.io.IOException;
+import java.util.List;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for ListStudentsSubmissions classroom snippet
+public class TestListStudentsSubmissions extends BaseTest {
+
+  @Test
+  public void testListStudentsSubmissions() throws IOException {
+    List<StudentSubmission> studentSubmissions = ListStudentsSubmissions.listStudentsSubmissions(
+        testCourse.getId(),
+        "-");
+    Assert.assertNotNull("Student Submissions not returned.", studentSubmissions);
+  }
+}

From 0cfab7864c785ac49b42ce55f9a03c42907eeeea Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Fri, 9 Dec 2022 17:25:15 -0500
Subject: [PATCH 07/50] minor fixes

---
 classroom/snippets/src/main/java/ListStudentSubmissions.java    | 2 +-
 .../src/main/java/ModifyAttachmentsStudentSubmission.java       | 2 +-
 classroom/snippets/src/main/java/PatchStudentSubmission.java    | 1 +
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index ca9ec5d9..cfcf14ab 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -39,7 +39,7 @@ public class ListStudentSubmissions {
    * @param courseId - identifier of the course.
    * @param courseWorkId - identifier of the course work.
    * @param userId - identifier of the student whose work to return.
-   * @return - list of student submission.
+   * @return - list of student submissions.
    * @throws IOException - if credentials file not found.
    */
   public static List<StudentSubmission> listStudentSubmissions(String courseId, String courseWorkId,
diff --git a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
index df3f17da..50aeb711 100644
--- a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
+++ b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
@@ -32,7 +32,7 @@
 import java.util.Arrays;
 import java.util.Collections;
 
-/* Class to demonstrate the use of Classroom Modify Attachments StudentSubmissions API. */
+/* Class to demonstrate the use of Classroom ModifyAttachments StudentSubmissions API. */
 public class ModifyAttachmentsStudentSubmission {
   /**
    * Lists student submissions based on courseId, courseWorkId, and userId.
diff --git a/classroom/snippets/src/main/java/PatchStudentSubmission.java b/classroom/snippets/src/main/java/PatchStudentSubmission.java
index 25ee96c1..6248c9a5 100644
--- a/classroom/snippets/src/main/java/PatchStudentSubmission.java
+++ b/classroom/snippets/src/main/java/PatchStudentSubmission.java
@@ -68,6 +68,7 @@ public static StudentSubmission patchStudentSubmission(String courseId, String c
       content.setDraftGrade(90.00);
       studentSubmission = service.courses().courseWork().studentSubmissions()
           .patch(courseId, courseWorkId, id, content)
+          .set("updateMask", "draftGrade,assignedGrade")
           .execute();
     } catch (GoogleJsonResponseException e) {
       GoogleJsonError error = e.getDetails();

From bd46dd42b4c8884d3d3efc3f042ef362150ef8f7 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Fri, 9 Dec 2022 17:45:53 -0500
Subject: [PATCH 08/50] adding comments for developer

---
 classroom/snippets/src/main/java/ListStudentSubmissions.java     | 1 +
 classroom/snippets/src/main/java/ListStudentsSubmissions.java    | 1 +
 .../src/main/java/ModifyAttachmentsStudentSubmission.java        | 1 +
 classroom/snippets/src/main/java/PatchStudentSubmission.java     | 1 +
 classroom/snippets/src/main/java/ReturnStudentSubmission.java    | 1 +
 5 files changed, 5 insertions(+)

diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index cfcf14ab..f9e451b6 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -70,6 +70,7 @@ public static List<StudentSubmission> listStudentSubmissions(String courseId, St
           .execute();
       studentSubmissions.addAll(response.getStudentSubmissions());
     } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf("The courseId (%s), courseWorkId (%s), or userId (%s) does "
diff --git a/classroom/snippets/src/main/java/ListStudentsSubmissions.java b/classroom/snippets/src/main/java/ListStudentsSubmissions.java
index 2e79ab44..50a4d91c 100644
--- a/classroom/snippets/src/main/java/ListStudentsSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentsSubmissions.java
@@ -69,6 +69,7 @@ public static List<StudentSubmission> listStudentsSubmissions(String courseId, S
         studentSubmissions.addAll(response.getStudentSubmissions());
       }
     } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf("The courseId (%s) or courseWorkId (%s) (%s) does not exist.\n", courseId,
diff --git a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
index 50aeb711..0a27bb3c 100644
--- a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
+++ b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
@@ -73,6 +73,7 @@ public static StudentSubmission modifyAttachments(String courseId, String course
           courseId, courseWorkId, id, modifyAttachmentsRequest)
           .execute();
     } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf("The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "
diff --git a/classroom/snippets/src/main/java/PatchStudentSubmission.java b/classroom/snippets/src/main/java/PatchStudentSubmission.java
index 6248c9a5..847c46d5 100644
--- a/classroom/snippets/src/main/java/PatchStudentSubmission.java
+++ b/classroom/snippets/src/main/java/PatchStudentSubmission.java
@@ -71,6 +71,7 @@ public static StudentSubmission patchStudentSubmission(String courseId, String c
           .set("updateMask", "draftGrade,assignedGrade")
           .execute();
     } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf("The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "
diff --git a/classroom/snippets/src/main/java/ReturnStudentSubmission.java b/classroom/snippets/src/main/java/ReturnStudentSubmission.java
index 38bfcf45..14211c6a 100644
--- a/classroom/snippets/src/main/java/ReturnStudentSubmission.java
+++ b/classroom/snippets/src/main/java/ReturnStudentSubmission.java
@@ -61,6 +61,7 @@ public static void returnSubmission(String courseId, String courseWorkId, String
           .classroomReturn(courseId, courseWorkId, id, null)
           .execute();
     } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf("The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "

From 59b07b361c415f1904447db8d72804bfa2d12210 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 13 Dec 2022 13:00:29 -0500
Subject: [PATCH 09/50] modifications based on team review

---
 .../snippets/src/main/java/ListStudentSubmissions.java |  2 +-
 ...stStudentsSubmissions.java => ListSubmissions.java} |  6 +++---
 .../main/java/ModifyAttachmentsStudentSubmission.java  |  4 +++-
 .../snippets/src/main/java/PatchStudentSubmission.java |  6 ++++--
 .../src/main/java/ReturnStudentSubmission.java         |  2 +-
 ...udentsSubmissions.java => TestListSubmissions.java} | 10 +++++-----
 6 files changed, 17 insertions(+), 13 deletions(-)
 rename classroom/snippets/src/main/java/{ListStudentsSubmissions.java => ListSubmissions.java} (94%)
 rename classroom/snippets/src/test/java/{TestListStudentsSubmissions.java => TestListSubmissions.java} (68%)

diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index f9e451b6..636a24ab 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -34,7 +34,7 @@
 /* Class to demonstrate the use of Classroom List StudentSubmissions API. */
 public class ListStudentSubmissions {
   /**
-   * Lists student submissions based on courseId, courseWorkId, and userId.
+   * Retrieves a specific student's submissions for the specified course work.
    *
    * @param courseId - identifier of the course.
    * @param courseWorkId - identifier of the course work.
diff --git a/classroom/snippets/src/main/java/ListStudentsSubmissions.java b/classroom/snippets/src/main/java/ListSubmissions.java
similarity index 94%
rename from classroom/snippets/src/main/java/ListStudentsSubmissions.java
rename to classroom/snippets/src/main/java/ListSubmissions.java
index 50a4d91c..aafafc8d 100644
--- a/classroom/snippets/src/main/java/ListStudentsSubmissions.java
+++ b/classroom/snippets/src/main/java/ListSubmissions.java
@@ -32,16 +32,16 @@
 import java.util.List;
 
 /* Class to demonstrate the use of Classroom List StudentSubmissions API. */
-public class ListStudentsSubmissions {
+public class ListSubmissions {
   /**
-   * Lists students submissions based on courseId and courseWorkId.
+   * Retrieves submissions for all students for the specified course work in a course.
    *
    * @param courseId - identifier of the course.
    * @param courseWorkId - identifier of the course work.
    * @return - list of student submissions.
    * @throws IOException - if credentials file not found.
    */
-  public static List<StudentSubmission> listStudentsSubmissions(String courseId, String courseWorkId)
+  public static List<StudentSubmission> listSubmissions(String courseId, String courseWorkId)
       throws IOException {
     /* Load pre-authorized user credentials from the environment.
      TODO(developer) - See https://developers.google.com/identity for
diff --git a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
index 0a27bb3c..b573e55b 100644
--- a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
+++ b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
@@ -35,7 +35,7 @@
 /* Class to demonstrate the use of Classroom ModifyAttachments StudentSubmissions API. */
 public class ModifyAttachmentsStudentSubmission {
   /**
-   * Lists student submissions based on courseId, courseWorkId, and userId.
+   * Modify attachments on a student submission.
    *
    * @param courseId - identifier of the course.
    * @param courseWorkId - identifier of the course work.
@@ -69,6 +69,8 @@ public static StudentSubmission modifyAttachments(String courseId, String course
       Attachment attachment = new Attachment().setLink(link);
       ModifyAttachmentsRequest modifyAttachmentsRequest = new ModifyAttachmentsRequest()
           .setAddAttachments(Arrays.asList(attachment));
+
+      // The modified studentSubmission object is returned with the new attachment added to it.
       studentSubmission = service.courses().courseWork().studentSubmissions().modifyAttachments(
           courseId, courseWorkId, id, modifyAttachmentsRequest)
           .execute();
diff --git a/classroom/snippets/src/main/java/PatchStudentSubmission.java b/classroom/snippets/src/main/java/PatchStudentSubmission.java
index 847c46d5..83a29b47 100644
--- a/classroom/snippets/src/main/java/PatchStudentSubmission.java
+++ b/classroom/snippets/src/main/java/PatchStudentSubmission.java
@@ -31,7 +31,7 @@
 /* Class to demonstrate the use of Classroom Patch StudentSubmissions API. */
 public class PatchStudentSubmission {
   /**
-   * Updates one or more fields of a student submission.
+   * Updates the draft grade and/or assigned grade of a student submission.
    *
    * @param courseId - identifier of the course.
    * @param courseWorkId - identifier of the course work.
@@ -60,12 +60,14 @@ public static StudentSubmission patchStudentSubmission(String courseId, String c
 
     StudentSubmission studentSubmission = null;
     try {
-      //
+      // Updating the draftGrade and assignedGrade fields for the specific student submission.
       StudentSubmission content = service.courses().courseWork().studentSubmissions()
           .get(courseId, courseWorkId, id)
           .execute();
       content.setAssignedGrade(80.00);
       content.setDraftGrade(90.00);
+
+      // The updated studentSubmission object is returned with the new draftGrade and assignedGrade.
       studentSubmission = service.courses().courseWork().studentSubmissions()
           .patch(courseId, courseWorkId, id, content)
           .set("updateMask", "draftGrade,assignedGrade")
diff --git a/classroom/snippets/src/main/java/ReturnStudentSubmission.java b/classroom/snippets/src/main/java/ReturnStudentSubmission.java
index 14211c6a..6b40fc96 100644
--- a/classroom/snippets/src/main/java/ReturnStudentSubmission.java
+++ b/classroom/snippets/src/main/java/ReturnStudentSubmission.java
@@ -30,7 +30,7 @@
 /* Class to demonstrate the use of Classroom Return StudentSubmissions API. */
 public class ReturnStudentSubmission {
   /**
-   * Return student submission.
+   * Return a student submission back to the student which updates the submission state to `RETURNED`.
    *
    * @param courseId - identifier of the course.
    * @param courseWorkId - identifier of the course work.
diff --git a/classroom/snippets/src/test/java/TestListStudentsSubmissions.java b/classroom/snippets/src/test/java/TestListSubmissions.java
similarity index 68%
rename from classroom/snippets/src/test/java/TestListStudentsSubmissions.java
rename to classroom/snippets/src/test/java/TestListSubmissions.java
index d92a77ca..b4bafd26 100644
--- a/classroom/snippets/src/test/java/TestListStudentsSubmissions.java
+++ b/classroom/snippets/src/test/java/TestListSubmissions.java
@@ -18,14 +18,14 @@
 import org.junit.Assert;
 import org.junit.Test;
 
-// Unit test class for ListStudentsSubmissions classroom snippet
-public class TestListStudentsSubmissions extends BaseTest {
+// Unit test class for ListSubmissions classroom snippet
+public class TestListSubmissions extends BaseTest {
 
   @Test
-  public void testListStudentsSubmissions() throws IOException {
-    List<StudentSubmission> studentSubmissions = ListStudentsSubmissions.listStudentsSubmissions(
+  public void testListSubmissions() throws IOException {
+    List<StudentSubmission> submissions = ListSubmissions.listSubmissions(
         testCourse.getId(),
         "-");
-    Assert.assertNotNull("Student Submissions not returned.", studentSubmissions);
+    Assert.assertNotNull("Submissions not returned.", submissions);
   }
 }

From 9968e729ba17cf52cb721d9eb48085a05c6f1ff4 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 13 Dec 2022 14:50:36 -0500
Subject: [PATCH 10/50] modifications based on team review

---
 classroom/snippets/src/main/java/ListStudentSubmissions.java  | 4 +++-
 classroom/snippets/src/main/java/ListSubmissions.java         | 2 +-
 .../src/main/java/ModifyAttachmentsStudentSubmission.java     | 2 +-
 classroom/snippets/src/main/java/PatchStudentSubmission.java  | 2 +-
 classroom/snippets/src/test/java/TestListSubmissions.java     | 2 +-
 5 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index 636a24ab..2243ec3c 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -68,7 +68,9 @@ public static List<StudentSubmission> listStudentSubmissions(String courseId, St
           .list(courseId, courseWorkId)
           .set("userId", userId)
           .execute();
-      studentSubmissions.addAll(response.getStudentSubmissions());
+      if (response.getStudentSubmissions() != null) {
+        studentSubmissions.addAll(response.getStudentSubmissions());
+      }
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
diff --git a/classroom/snippets/src/main/java/ListSubmissions.java b/classroom/snippets/src/main/java/ListSubmissions.java
index aafafc8d..dd0d8201 100644
--- a/classroom/snippets/src/main/java/ListSubmissions.java
+++ b/classroom/snippets/src/main/java/ListSubmissions.java
@@ -72,7 +72,7 @@ public static List<StudentSubmission> listSubmissions(String courseId, String co
       //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
-        System.out.printf("The courseId (%s) or courseWorkId (%s) (%s) does not exist.\n", courseId,
+        System.out.printf("The courseId (%s) or courseWorkId (%s) does not exist.\n", courseId,
             courseWorkId);
       } else {
         throw e;
diff --git a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
index b573e55b..8f209966 100644
--- a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
+++ b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
@@ -40,7 +40,7 @@ public class ModifyAttachmentsStudentSubmission {
    * @param courseId - identifier of the course.
    * @param courseWorkId - identifier of the course work.
    * @param id - identifier of the student submission.
-   * @return - the modified student submissions.
+   * @return - the modified student submission.
    * @throws IOException - if credentials file not found.
    */
   public static StudentSubmission modifyAttachments(String courseId, String courseWorkId, String id)
diff --git a/classroom/snippets/src/main/java/PatchStudentSubmission.java b/classroom/snippets/src/main/java/PatchStudentSubmission.java
index 83a29b47..92fd39dd 100644
--- a/classroom/snippets/src/main/java/PatchStudentSubmission.java
+++ b/classroom/snippets/src/main/java/PatchStudentSubmission.java
@@ -36,7 +36,7 @@ public class PatchStudentSubmission {
    * @param courseId - identifier of the course.
    * @param courseWorkId - identifier of the course work.
    * @param id - identifier of the student submission.
-   * @return - updated StudentSubmission instance.
+   * @return - the updated student submission.
    * @throws IOException - if credentials file not found.
    */
   public static StudentSubmission patchStudentSubmission(String courseId, String courseWorkId,
diff --git a/classroom/snippets/src/test/java/TestListSubmissions.java b/classroom/snippets/src/test/java/TestListSubmissions.java
index b4bafd26..148e9529 100644
--- a/classroom/snippets/src/test/java/TestListSubmissions.java
+++ b/classroom/snippets/src/test/java/TestListSubmissions.java
@@ -26,6 +26,6 @@ public void testListSubmissions() throws IOException {
     List<StudentSubmission> submissions = ListSubmissions.listSubmissions(
         testCourse.getId(),
         "-");
-    Assert.assertNotNull("Submissions not returned.", submissions);
+    Assert.assertNotNull("No submissions returned.", submissions);
   }
 }

From dbf1401f19ea40ee69b05255125a4b6a8e073c6b Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Fri, 16 Dec 2022 14:57:41 -0600
Subject: [PATCH 11/50] Adding print statements and devsite tag to
 ListCourseAliases

---
 .../src/main/java/CreateCourseWork.java       |  5 ++--
 .../snippets/src/main/java/GetTopic.java      |  1 +
 .../src/main/java/ListCourseAliases.java      |  8 ++++--
 .../src/main/java/ListStudentSubmissions.java | 27 ++++++++++++++-----
 .../src/main/java/ListSubmissions.java        | 23 ++++++++++++----
 .../snippets/src/main/java/ListTopics.java    |  6 +++--
 .../ModifyAttachmentsStudentSubmission.java   |  5 ++++
 .../src/main/java/PatchStudentSubmission.java |  9 +++++--
 .../snippets/src/main/java/UpdateTopic.java   |  5 +++-
 9 files changed, 68 insertions(+), 21 deletions(-)

diff --git a/classroom/snippets/src/main/java/CreateCourseWork.java b/classroom/snippets/src/main/java/CreateCourseWork.java
index 631ced38..7f9973ca 100644
--- a/classroom/snippets/src/main/java/CreateCourseWork.java
+++ b/classroom/snippets/src/main/java/CreateCourseWork.java
@@ -80,13 +80,14 @@ public static CourseWork createCourseWork(String courseId) throws IOException {
           .setDescription("Read about how the SR-71 Blackbird, the world’s fastest and "
               + "highest-flying manned aircraft, was built.")
           .setMaterials(materials)
-          .setDueDate(new Date().setMonth(12).setDay(10).setYear(2022))
-          .setDueTime(new TimeOfDay().setHours(15).setMinutes(0))
           .setWorkType("ASSIGNMENT")
           .setState("PUBLISHED");
 
       courseWork = service.courses().courseWork().create(courseId, content)
           .execute();
+
+      /* Prints the created courseWork. */
+      System.out.printf("CourseWork created: %s\n", courseWork.getTitle());
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
diff --git a/classroom/snippets/src/main/java/GetTopic.java b/classroom/snippets/src/main/java/GetTopic.java
index 5332bd5c..140a0407 100644
--- a/classroom/snippets/src/main/java/GetTopic.java
+++ b/classroom/snippets/src/main/java/GetTopic.java
@@ -60,6 +60,7 @@ public static Topic getTopic(String courseId, String topicId) throws IOException
     try {
       // Get the topic.
       topic = service.courses().topics().get(courseId, topicId).execute();
+      System.out.printf("Topic '%s' found.\n", topic.getName());
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
diff --git a/classroom/snippets/src/main/java/ListCourseAliases.java b/classroom/snippets/src/main/java/ListCourseAliases.java
index 171f4fa6..c3141cf1 100644
--- a/classroom/snippets/src/main/java/ListCourseAliases.java
+++ b/classroom/snippets/src/main/java/ListCourseAliases.java
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 
-// [START classroom_list_aliases]
+// [START classroom_list_aliases_class]
 
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
@@ -57,6 +57,8 @@ public static List<CourseAlias> listCourseAliases(String courseId)
         .setApplicationName("Classroom samples")
         .build();
 
+    // [START classroom_list_aliases_code_snippet]
+
     String pageToken = null;
     List<CourseAlias> courseAliases = new ArrayList<>();
 
@@ -89,6 +91,8 @@ public static List<CourseAlias> listCourseAliases(String courseId)
       }
     }
     return courseAliases;
+
+    // [END classroom_list_aliases_code_snippet]
   }
 }
-// [END classroom_list_aliases]
\ No newline at end of file
+// [END classroom_list_aliases_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index 2243ec3c..acc7b898 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -62,14 +62,27 @@ public static List<StudentSubmission> listStudentSubmissions(String courseId, St
     // [START classroom_list_student_submissions_code_snippet]
 
     List<StudentSubmission> studentSubmissions = new ArrayList<>();
+    String pageToken = null;
+
     try {
-      // Set the userId as a query parameter on the request.
-      ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
-          .list(courseId, courseWorkId)
-          .set("userId", userId)
-          .execute();
-      if (response.getStudentSubmissions() != null) {
-        studentSubmissions.addAll(response.getStudentSubmissions());
+      do {
+        // Set the userId as a query parameter on the request.
+        ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
+            .list(courseId, courseWorkId)
+            .set("userId", userId)
+            .execute();
+        if (response.getStudentSubmissions() != null) {
+          studentSubmissions.addAll(response.getStudentSubmissions());
+          pageToken = response.getNextPageToken();
+        }
+      } while (pageToken != null);
+
+      if (studentSubmissions.isEmpty()) {
+        System.out.println("No student submission found.");
+      } else {
+        for (StudentSubmission submission : studentSubmissions) {
+          System.out.printf("Student submission: %s.\n", submission.getId());
+        }
       }
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
diff --git a/classroom/snippets/src/main/java/ListSubmissions.java b/classroom/snippets/src/main/java/ListSubmissions.java
index dd0d8201..ed5898de 100644
--- a/classroom/snippets/src/main/java/ListSubmissions.java
+++ b/classroom/snippets/src/main/java/ListSubmissions.java
@@ -61,12 +61,25 @@ public static List<StudentSubmission> listSubmissions(String courseId, String co
     // [START classroom_list_submissions_code_snippet]
 
     List<StudentSubmission> studentSubmissions = new ArrayList<>();
+    String pageToken = null;
+
     try {
-      ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
-          .list(courseId, courseWorkId)
-          .execute();
-      if (response.getStudentSubmissions() != null) {
-        studentSubmissions.addAll(response.getStudentSubmissions());
+      do {
+        ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
+            .list(courseId, courseWorkId)
+            .execute();
+        if (response.getStudentSubmissions() != null) {
+          studentSubmissions.addAll(response.getStudentSubmissions());
+        }
+      } while (pageToken != null);
+
+      if (studentSubmissions.isEmpty()) {
+        System.out.println("No student submission found.");
+      } else {
+        for (StudentSubmission submission : studentSubmissions) {
+          System.out.printf("Student id (%s), student submission id (%s)\n", submission.getUserId(),
+              submission.getId());
+        }
       }
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
diff --git a/classroom/snippets/src/main/java/ListTopics.java b/classroom/snippets/src/main/java/ListTopics.java
index 61ea9b89..e754f82b 100644
--- a/classroom/snippets/src/main/java/ListTopics.java
+++ b/classroom/snippets/src/main/java/ListTopics.java
@@ -67,8 +67,10 @@ public static List<Topic> listTopics(String courseId) throws IOException {
             .setPageSize(100)
             .setPageToken(pageToken)
             .execute();
-        topics.addAll(response.getTopic());
-        pageToken = response.getNextPageToken();
+        if (response.getTopic() != null) {
+          topics.addAll(response.getTopic());
+          pageToken = response.getNextPageToken();
+        }
       } while (pageToken != null);
 
       if (topics.isEmpty()) {
diff --git a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
index 8f209966..252f51f5 100644
--- a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
+++ b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
@@ -74,6 +74,11 @@ public static StudentSubmission modifyAttachments(String courseId, String course
       studentSubmission = service.courses().courseWork().studentSubmissions().modifyAttachments(
           courseId, courseWorkId, id, modifyAttachmentsRequest)
           .execute();
+
+      /* Prints the modified student submission. */
+      System.out.printf("Modified student submission attachments: '%s'.\n", studentSubmission
+          .getAssignmentSubmission()
+          .getAttachments());
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
diff --git a/classroom/snippets/src/main/java/PatchStudentSubmission.java b/classroom/snippets/src/main/java/PatchStudentSubmission.java
index 92fd39dd..1690ef8e 100644
--- a/classroom/snippets/src/main/java/PatchStudentSubmission.java
+++ b/classroom/snippets/src/main/java/PatchStudentSubmission.java
@@ -64,14 +64,19 @@ public static StudentSubmission patchStudentSubmission(String courseId, String c
       StudentSubmission content = service.courses().courseWork().studentSubmissions()
           .get(courseId, courseWorkId, id)
           .execute();
-      content.setAssignedGrade(80.00);
-      content.setDraftGrade(90.00);
+      content.setAssignedGrade(90.00);
+      content.setDraftGrade(80.00);
 
       // The updated studentSubmission object is returned with the new draftGrade and assignedGrade.
       studentSubmission = service.courses().courseWork().studentSubmissions()
           .patch(courseId, courseWorkId, id, content)
           .set("updateMask", "draftGrade,assignedGrade")
           .execute();
+
+      /* Prints the updated student submission. */
+      System.out.printf("Updated student submission draft grade (%s) and assigned grade (%s).\n",
+          studentSubmission.getDraftGrade(),
+          studentSubmission.getAssignedGrade());
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
diff --git a/classroom/snippets/src/main/java/UpdateTopic.java b/classroom/snippets/src/main/java/UpdateTopic.java
index 770bee30..f45ffeca 100644
--- a/classroom/snippets/src/main/java/UpdateTopic.java
+++ b/classroom/snippets/src/main/java/UpdateTopic.java
@@ -69,7 +69,10 @@ public static Topic updateTopic(String courseId, String topicId) throws IOExcept
       topic = service.courses().topics().patch(courseId, topicId, topicToUpdate)
           .set("updateMask", "name")
           .execute();
-    } catch(GoogleJsonResponseException e) {
+
+      /* Prints the updated topic. */
+      System.out.printf("Topic '%s' updated.\n", topic.getName());
+    } catch (GoogleJsonResponseException e) {
       // TODO(developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {

From 2391573ef5835dfbd0ea01c1eefcd3cda18a60de Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Fri, 16 Dec 2022 16:21:50 -0600
Subject: [PATCH 12/50] added class templates for guardians and
 guardianInvitations

---
 .../main/java/CancelGuardianInvitation.java   | 21 +++++++++++++++++++
 .../main/java/CreateGuardianInvitation.java   | 21 +++++++++++++++++++
 .../src/main/java/DeleteGuardian.java         | 21 +++++++++++++++++++
 .../ListGuardianInvitationsByStudent.java     | 21 +++++++++++++++++++
 .../snippets/src/main/java/ListGuardians.java | 21 +++++++++++++++++++
 5 files changed, 105 insertions(+)
 create mode 100644 classroom/snippets/src/main/java/CancelGuardianInvitation.java
 create mode 100644 classroom/snippets/src/main/java/CreateGuardianInvitation.java
 create mode 100644 classroom/snippets/src/main/java/DeleteGuardian.java
 create mode 100644 classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
 create mode 100644 classroom/snippets/src/main/java/ListGuardians.java

diff --git a/classroom/snippets/src/main/java/CancelGuardianInvitation.java b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
new file mode 100644
index 00000000..1bd0bce1
--- /dev/null
+++ b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
@@ -0,0 +1,21 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_cancel_guardian_invitation_class]
+
+public class CancelGuardianInvitation {
+
+}
+// [END classroom_cancel_guardian_invitation_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/CreateGuardianInvitation.java b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
new file mode 100644
index 00000000..6fcd45d7
--- /dev/null
+++ b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
@@ -0,0 +1,21 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_create_guardian_invitation_class]
+
+public class CreateGuardianInvitation {
+
+}
+// [END classroom_create_guardian_invitation_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/DeleteGuardian.java b/classroom/snippets/src/main/java/DeleteGuardian.java
new file mode 100644
index 00000000..3f564779
--- /dev/null
+++ b/classroom/snippets/src/main/java/DeleteGuardian.java
@@ -0,0 +1,21 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_delete_guardian_class]
+
+public class DeleteGuardian {
+
+}
+// [END classroom_delete_guardian_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
new file mode 100644
index 00000000..0063578d
--- /dev/null
+++ b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
@@ -0,0 +1,21 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_list_guardian_invitations_class]
+
+public class ListGuardianInvitationsByStudent {
+
+}
+// [END classroom_list_guardian_invitations_class]
diff --git a/classroom/snippets/src/main/java/ListGuardians.java b/classroom/snippets/src/main/java/ListGuardians.java
new file mode 100644
index 00000000..dbc8030f
--- /dev/null
+++ b/classroom/snippets/src/main/java/ListGuardians.java
@@ -0,0 +1,21 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_list_guardians_class]
+
+public class ListGuardians {
+
+}
+// [END classroom_list_guardians_class]

From fa1c6b0dee3397a0f13eaf922f07fc002323fae5 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Fri, 16 Dec 2022 17:00:20 -0600
Subject: [PATCH 13/50] guardian and guardian invitation implementation

---
 .../main/java/CancelGuardianInvitation.java   | 75 +++++++++++++++++-
 .../main/java/CreateGuardianInvitation.java   | 68 ++++++++++++++++
 .../src/main/java/DeleteGuardian.java         | 47 +++++++++++
 .../ListGuardianInvitationsByStudent.java     | 77 +++++++++++++++++++
 .../snippets/src/main/java/ListGuardians.java | 77 +++++++++++++++++++
 .../snippets/src/main/java/ListTopics.java    |  6 +-
 6 files changed, 347 insertions(+), 3 deletions(-)

diff --git a/classroom/snippets/src/main/java/CancelGuardianInvitation.java b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
index 1bd0bce1..7f3a07f7 100644
--- a/classroom/snippets/src/main/java/CancelGuardianInvitation.java
+++ b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
@@ -12,10 +12,83 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_cancel_guardian_invitation_class]
 
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.GuardianInvitation;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate the use of Classroom Patch Guardian Invitation API. */
 public class CancelGuardianInvitation {
+  /**
+   * Cancel a guardian invitation by modifying the state of the invite.
+   *
+   * @param studentId - the id of the student.
+   * @param invitationId - the id of the guardian invitation to modify.
+   * @return - the modified guardian invitation.
+   * @throws IOException - if credentials file not found.
+   */
+  public static GuardianInvitation cancelGuardianInvitation(String studentId, String invitationId)
+      throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client.
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    // [START classroom_cancel_guardian_invitation_code_snippet]
+
+    GuardianInvitation guardianInvitation = null;
+
+    try {
+      /* Change the state of the GuardianInvitation from PENDING to COMPLETE. See
+    https://developers.google.com/classroom/reference/rest/v1/userProfiles.guardianInvitations#guardianinvitationstate
+    for other possible states of guardian invitations. */
+      GuardianInvitation content = service.userProfiles().guardianInvitations()
+          .get(studentId, invitationId)
+          .execute();
+      content.setState("COMPLETE");
+
+      guardianInvitation = service.userProfiles().guardianInvitations()
+          .patch(studentId, invitationId, content)
+          .set("updateMask", "state")
+          .execute();
+
+      System.out.printf("Invitation (%s) state set to %s", guardianInvitation.getInvitationId(),
+          guardianInvitation.getState());
+    } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("There is no record of studentId (%s) or invitationId (%s).", studentId,
+            invitationId);
+      } else {
+        throw e;
+      }
+    } catch (Exception e) {
+      throw e;
+    }
+    return guardianInvitation;
 
+    // [END classroom_cancel_guardian_invitation_code_snippet]
+  }
 }
 // [END classroom_cancel_guardian_invitation_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/CreateGuardianInvitation.java b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
index 6fcd45d7..f4cd1927 100644
--- a/classroom/snippets/src/main/java/CreateGuardianInvitation.java
+++ b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
@@ -15,7 +15,75 @@
 
 // [START classroom_create_guardian_invitation_class]
 
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.GuardianInvitation;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate the use of Classroom Create Guardian Invitation API. */
 public class CreateGuardianInvitation {
+  /**
+   * Creates a guardian invitation by sending an email to the guardian for confirmation.
+   *
+   * @param studentId - the id of the student.
+   * @return - the newly created guardian invitation.
+   * @throws IOException - if credentials file not found.
+   */
+  public static GuardianInvitation createGuardianInvitation(String studentId) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client.
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    // [START classroom_create_guardian_invitation_code_snippet]
+
+    GuardianInvitation guardianInvitation = null;
+
+    /* Create a GuardianInvitation object with state set to PENDING. See
+    https://developers.google.com/classroom/reference/rest/v1/userProfiles.guardianInvitations#guardianinvitationstate
+    for other possible states of guardian invitations. */
+    GuardianInvitation content = new GuardianInvitation()
+        .setStudentId(studentId)
+        .setInvitationId("guardian@gmail.com")
+        .setState("PENDING");
+    try {
+      guardianInvitation = service.userProfiles().guardianInvitations()
+          .create(studentId, content)
+          .execute();
+
+      System.out.printf("Invitation created: %s", guardianInvitation.getInvitationId());
+    } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("There is no record of studentId: %s", studentId);
+      } else {
+        throw e;
+      }
+    } catch (Exception e) {
+      throw e;
+    }
+    return guardianInvitation;
 
+    // [END classroom_create_guardian_invitation_code_snippet]
+  }
 }
 // [END classroom_create_guardian_invitation_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/DeleteGuardian.java b/classroom/snippets/src/main/java/DeleteGuardian.java
index 3f564779..3cdd1f95 100644
--- a/classroom/snippets/src/main/java/DeleteGuardian.java
+++ b/classroom/snippets/src/main/java/DeleteGuardian.java
@@ -15,7 +15,54 @@
 
 // [START classroom_delete_guardian_class]
 
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+
+/* Class to demonstrate the use of Classroom Delete Guardian API. */
 public class DeleteGuardian {
+  /**
+   * Delete a guardian for a specific student.
+   *
+   * @param studentId - the id of the student the guardian belongs to.
+   * @param guardianId - the id of the guardian to delete.
+   * @throws IOException - if credentials file not found.
+   */
+  public static void deleteGuardian(String studentId, String guardianId) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client.
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
 
+    // [START classroom_delete_guardian_code_snippet]
+    try {
+      service.userProfiles().guardians().delete(studentId, guardianId)
+          .execute();
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("There is no record of guardianId (%s).", guardianId);
+      }
+    }
+    // [END classroom_delete_guardian_code_snippet]
+  }
 }
 // [END classroom_delete_guardian_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
index 0063578d..312010f6 100644
--- a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
+++ b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
@@ -15,7 +15,84 @@
 
 // [START classroom_list_guardian_invitations_class]
 
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.GuardianInvitation;
+import com.google.api.services.classroom.model.ListGuardianInvitationsResponse;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
+
+/* Class to demonstrate the use of Classroom List Guardian Invitations API. */
 public class ListGuardianInvitationsByStudent {
+  /**
+   * Retrieves guardian invitations by student.
+   *
+   * @param studentId - the id of the student.
+   * @return a list of guardian invitations that were sent for a specific student.
+   * @throws IOException - if credentials file not found.
+   */
+  public static List<GuardianInvitation> listGuardianInvitationsByStudent(String studentId)
+      throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client.
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    // [START classroom_list_guardian_invitations_code_snippet]
+
+    List<GuardianInvitation> guardianInvitations = null;
+    String pageToken = null;
+
+    try {
+      do {
+        ListGuardianInvitationsResponse response = service.userProfiles().guardianInvitations()
+            .list(studentId)
+            .execute();
+
+        if (response.getGuardianInvitations() != null) {
+          guardianInvitations.addAll(response.getGuardianInvitations());
+          pageToken = response.getNextPageToken();
+        }
+      } while (pageToken != null);
+
+      if (guardianInvitations.isEmpty()) {
+        System.out.println("No guardian invitations found.");
+      } else {
+        for (GuardianInvitation invitation : guardianInvitations) {
+          System.out.printf("Guardian invitation sent to %s", invitation.getInvitedEmailAddress());
+        }
+      }
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("There is no record of studentId (%s).", studentId);
+      } else {
+        throw e;
+      }
+    } catch (Exception e) {
+      throw e;
+    }
+    return guardianInvitations;
 
+    // [END classroom_list_guardian_invitations_code_snippet]
+  }
 }
 // [END classroom_list_guardian_invitations_class]
diff --git a/classroom/snippets/src/main/java/ListGuardians.java b/classroom/snippets/src/main/java/ListGuardians.java
index dbc8030f..4705a34e 100644
--- a/classroom/snippets/src/main/java/ListGuardians.java
+++ b/classroom/snippets/src/main/java/ListGuardians.java
@@ -15,7 +15,84 @@
 
 // [START classroom_list_guardians_class]
 
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.Guardian;
+import com.google.api.services.classroom.model.ListGuardiansResponse;
+import com.google.auth.http.HttpCredentialsAdapter;
+import com.google.auth.oauth2.GoogleCredentials;
+import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
+
+/* Class to demonstrate the use of Classroom List Guardians API. */
 public class ListGuardians {
+  /**
+   * Retrieves guardians for a specific student.
+   *
+   * @param studentId - the id of the student.
+   * @return a list of guardians for a specific student.
+   * @throws IOException - if credentials file not found.
+   */
+  public static List<Guardian> listGuardians(String studentId) throws IOException {
+    /* Load pre-authorized user credentials from the environment.
+     TODO(developer) - See https://developers.google.com/identity for
+      guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
+        credentials);
+
+    // Create the classroom API client.
+    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+        GsonFactory.getDefaultInstance(),
+        requestInitializer)
+        .setApplicationName("Classroom samples")
+        .build();
+
+    // [START classroom_list_guardians_code_snippet]
+
+    List<Guardian> guardians = null;
+    String pageToken = null;
+
+    try {
+      do {
+        ListGuardiansResponse response = service.userProfiles().guardians()
+            .list(studentId)
+            .execute();
+
+        if (response.getGuardians() != null) {
+          guardians.addAll(response.getGuardians());
+          pageToken = response.getNextPageToken();
+        }
+      } while (pageToken != null);
+
+      if (guardians.isEmpty()) {
+        System.out.println("No guardians found.");
+      } else {
+        for (Guardian guardian : guardians) {
+          System.out.printf("Guardian: %s", guardian.getGuardianProfile().getName().getFullName());
+        }
+      }
+
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("There is no record of studentId (%s).", studentId);
+      } else {
+        throw e;
+      }
+    } catch (Exception e) {
+      throw e;
+    }
+    return guardians;
 
+    // [END classroom_list_guardians_code_snippet]
+  }
 }
 // [END classroom_list_guardians_class]
diff --git a/classroom/snippets/src/main/java/ListTopics.java b/classroom/snippets/src/main/java/ListTopics.java
index 61ea9b89..e754f82b 100644
--- a/classroom/snippets/src/main/java/ListTopics.java
+++ b/classroom/snippets/src/main/java/ListTopics.java
@@ -67,8 +67,10 @@ public static List<Topic> listTopics(String courseId) throws IOException {
             .setPageSize(100)
             .setPageToken(pageToken)
             .execute();
-        topics.addAll(response.getTopic());
-        pageToken = response.getNextPageToken();
+        if (response.getTopic() != null) {
+          topics.addAll(response.getTopic());
+          pageToken = response.getNextPageToken();
+        }
       } while (pageToken != null);
 
       if (topics.isEmpty()) {

From d8a0421621ad016a751fcc3766c2c07355ea8ce9 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 20 Dec 2022 13:47:54 -0600
Subject: [PATCH 14/50] tests for list guardians and list guardian invitations

---
 .../ListGuardianInvitationsByStudent.java     |  7 ++--
 .../snippets/src/main/java/ListGuardians.java | 13 +++++---
 .../TestListGuardianInvitationsByStudent.java | 32 +++++++++++++++++++
 .../src/test/java/TestListGuardians.java      | 32 +++++++++++++++++++
 4 files changed, 76 insertions(+), 8 deletions(-)
 create mode 100644 classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
 create mode 100644 classroom/snippets/src/test/java/TestListGuardians.java

diff --git a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
index 312010f6..d7a3d91e 100644
--- a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
+++ b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
@@ -27,6 +27,7 @@
 import com.google.auth.http.HttpCredentialsAdapter;
 import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
@@ -45,7 +46,7 @@ public static List<GuardianInvitation> listGuardianInvitationsByStudent(String s
      TODO(developer) - See https://developers.google.com/identity for
       guides on implementing OAuth2 for your application. */
     GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS));
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS_READONLY));
     HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
         credentials);
 
@@ -58,7 +59,7 @@ public static List<GuardianInvitation> listGuardianInvitationsByStudent(String s
 
     // [START classroom_list_guardian_invitations_code_snippet]
 
-    List<GuardianInvitation> guardianInvitations = null;
+    List<GuardianInvitation> guardianInvitations = new ArrayList<>();
     String pageToken = null;
 
     try {
@@ -77,7 +78,7 @@ public static List<GuardianInvitation> listGuardianInvitationsByStudent(String s
         System.out.println("No guardian invitations found.");
       } else {
         for (GuardianInvitation invitation : guardianInvitations) {
-          System.out.printf("Guardian invitation sent to %s", invitation.getInvitedEmailAddress());
+          System.out.printf("Guardian invitation: %s\n", invitation.getInvitedEmailAddress());
         }
       }
     } catch (GoogleJsonResponseException e) {
diff --git a/classroom/snippets/src/main/java/ListGuardians.java b/classroom/snippets/src/main/java/ListGuardians.java
index 4705a34e..a11d993c 100644
--- a/classroom/snippets/src/main/java/ListGuardians.java
+++ b/classroom/snippets/src/main/java/ListGuardians.java
@@ -27,16 +27,17 @@
 import com.google.auth.http.HttpCredentialsAdapter;
 import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
 /* Class to demonstrate the use of Classroom List Guardians API. */
 public class ListGuardians {
   /**
-   * Retrieves guardians for a specific student.
+   * Retrieves active guardians for a specific student.
    *
    * @param studentId - the id of the student.
-   * @return a list of guardians for a specific student.
+   * @return a list of active guardians for a specific student.
    * @throws IOException - if credentials file not found.
    */
   public static List<Guardian> listGuardians(String studentId) throws IOException {
@@ -44,7 +45,7 @@ public static List<Guardian> listGuardians(String studentId) throws IOException
      TODO(developer) - See https://developers.google.com/identity for
       guides on implementing OAuth2 for your application. */
     GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS));
+        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS_READONLY));
     HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
         credentials);
 
@@ -57,7 +58,7 @@ public static List<Guardian> listGuardians(String studentId) throws IOException
 
     // [START classroom_list_guardians_code_snippet]
 
-    List<Guardian> guardians = null;
+    List<Guardian> guardians = new ArrayList<>();
     String pageToken = null;
 
     try {
@@ -76,7 +77,9 @@ public static List<Guardian> listGuardians(String studentId) throws IOException
         System.out.println("No guardians found.");
       } else {
         for (Guardian guardian : guardians) {
-          System.out.printf("Guardian: %s", guardian.getGuardianProfile().getName().getFullName());
+          System.out.printf("Guardian name: %s, guardian email: %s\n",
+              guardian.getGuardianProfile().getName().getFullName(),
+              guardian.getInvitedEmailAddress());
         }
       }
 
diff --git a/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java b/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
new file mode 100644
index 00000000..af5e64cb
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
@@ -0,0 +1,32 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.GuardianInvitation;
+import java.io.IOException;
+import java.util.List;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for List Guardian Invitations classroom snippet
+public class TestListGuardianInvitationsByStudent {
+
+  @Test
+  public void testGuardianInvitationsByStudent() throws IOException {
+    String studentId = "insert_student_id";
+    List<GuardianInvitation> invitationList = ListGuardianInvitationsByStudent
+        .listGuardianInvitationsByStudent(studentId);
+
+    Assert.assertTrue("No guardian invitations returned.", invitationList.size() > 0);
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestListGuardians.java b/classroom/snippets/src/test/java/TestListGuardians.java
new file mode 100644
index 00000000..86b4222d
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestListGuardians.java
@@ -0,0 +1,32 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.Guardian;
+import java.io.IOException;
+import java.util.List;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for List Guardians classroom snippet
+public class TestListGuardians {
+
+  @Test
+  public void testListGuardians() throws IOException {
+    String studentId = "insert_student_id";
+    List<Guardian> guardianList = ListGuardians.listGuardians(studentId);
+
+    Assert.assertTrue("No guardians returned.", guardianList.size() > 0);
+  }
+
+}

From d7fc3ecc0e8102f576bd3c865815049eaecad31f Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Wed, 21 Dec 2022 15:42:34 -0600
Subject: [PATCH 15/50] adding tests for guardians and guardian invites.
 removing use of ADC for auth.

---
 classroom/snippets/build.gradle               |  2 +-
 .../main/java/CancelGuardianInvitation.java   | 29 ++++---
 .../src/main/java/ClassroomCredentials.java   | 52 +++++++++++++
 .../main/java/CreateGuardianInvitation.java   | 33 ++++----
 .../src/main/java/DeleteGuardian.java         | 26 +++----
 .../snippets/src/main/java/GetGuardian.java   | 75 +++++++++++++++++++
 .../ListGuardianInvitationsByStudent.java     | 28 ++++---
 .../snippets/src/main/java/ListGuardians.java | 26 +++----
 .../java/TestCancelGuardianInvitation.java    | 31 ++++++++
 .../java/TestCreateGuardianInvitation.java    | 31 ++++++++
 .../src/test/java/TestDeleteGuardian.java     | 31 ++++++++
 .../TestListGuardianInvitationsByStudent.java |  3 +-
 .../src/test/java/TestListGuardians.java      |  3 +-
 13 files changed, 290 insertions(+), 80 deletions(-)
 create mode 100644 classroom/snippets/src/main/java/ClassroomCredentials.java
 create mode 100644 classroom/snippets/src/main/java/GetGuardian.java
 create mode 100644 classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
 create mode 100644 classroom/snippets/src/test/java/TestCreateGuardianInvitation.java
 create mode 100644 classroom/snippets/src/test/java/TestDeleteGuardian.java

diff --git a/classroom/snippets/build.gradle b/classroom/snippets/build.gradle
index 6971123c..7e19291b 100644
--- a/classroom/snippets/build.gradle
+++ b/classroom/snippets/build.gradle
@@ -7,7 +7,7 @@ repositories {
 
 dependencies {
     implementation 'com.google.api-client:google-api-client:2.0.0'
-    implementation 'com.google.auth:google-auth-library-oauth2-http:1.11.0'
+    implementation 'com.google.oauth-client:google-oauth-client-jetty:1.34.1'
     implementation 'com.google.apis:google-api-services-classroom:v1-rev20220323-2.0.0'
     testImplementation 'junit:junit:4.13.2'
 }
diff --git a/classroom/snippets/src/main/java/CancelGuardianInvitation.java b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
index 7f3a07f7..f6342eef 100644
--- a/classroom/snippets/src/main/java/CancelGuardianInvitation.java
+++ b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
@@ -14,18 +14,17 @@
 
 // [START classroom_cancel_guardian_invitation_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.GuardianInvitation;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
 import java.util.Collections;
+import java.util.List;
 
 /* Class to demonstrate the use of Classroom Patch Guardian Invitation API. */
 public class CancelGuardianInvitation {
@@ -38,19 +37,19 @@ public class CancelGuardianInvitation {
    * @throws IOException - if credentials file not found.
    */
   public static GuardianInvitation cancelGuardianInvitation(String studentId, String invitationId)
-      throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+      throws Exception {
 
-    // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+    /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+    final List<String> SCOPES =
+        Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
+
+    // Create the classroom API client
+    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        requestInitializer)
+        classroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
         .setApplicationName("Classroom samples")
         .build();
 
@@ -72,7 +71,7 @@ public static GuardianInvitation cancelGuardianInvitation(String studentId, Stri
           .set("updateMask", "state")
           .execute();
 
-      System.out.printf("Invitation (%s) state set to %s", guardianInvitation.getInvitationId(),
+      System.out.printf("Invitation (%s) state set to %s\n.", guardianInvitation.getInvitationId(),
           guardianInvitation.getState());
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
diff --git a/classroom/snippets/src/main/java/ClassroomCredentials.java b/classroom/snippets/src/main/java/ClassroomCredentials.java
new file mode 100644
index 00000000..0818d90e
--- /dev/null
+++ b/classroom/snippets/src/main/java/ClassroomCredentials.java
@@ -0,0 +1,52 @@
+import com.google.api.client.auth.oauth2.Credential;
+import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
+import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
+import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
+import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.JsonFactory;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.client.util.store.FileDataStoreFactory;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.Collection;
+
+public class ClassroomCredentials {
+  private static final JsonFactory JSON_FACTORY = GsonFactory.getDefaultInstance();
+  private static final String TOKENS_DIRECTORY_PATH = "tokens";
+
+  private static final String CREDENTIALS_FILE_PATH = "/credentials.json";
+
+  /**
+   * Creates an authorized Credential object.
+   *
+   * @param HTTP_TRANSPORT The network HTTP Transport.
+   * @param SCOPES The scopes required to make the API call.
+   * @return An authorized Credential object.
+   * @throws IOException If the credentials.json file cannot be found.
+   */
+  static Credential getCredentials(final NetHttpTransport HTTP_TRANSPORT,
+      Collection SCOPES)
+      throws IOException {
+    // Load client secrets.
+    InputStream in = ClassroomCredentials.class.getResourceAsStream(CREDENTIALS_FILE_PATH);
+    if (in == null) {
+      throw new FileNotFoundException("Resource not found: " + CREDENTIALS_FILE_PATH);
+    }
+
+    GoogleClientSecrets clientSecrets =
+        GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));
+
+    // Build flow and trigger user authorization request.
+    GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
+        HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
+        .setDataStoreFactory(new FileDataStoreFactory(new java.io.File(TOKENS_DIRECTORY_PATH)))
+        .setAccessType("offline")
+        .build();
+
+    LocalServerReceiver receiver = new LocalServerReceiver.Builder().setPort(8888).build();
+    return new AuthorizationCodeInstalledApp(flow, receiver).authorize("user");
+  }
+}
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/CreateGuardianInvitation.java b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
index f4cd1927..5a79e487 100644
--- a/classroom/snippets/src/main/java/CreateGuardianInvitation.java
+++ b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
@@ -15,18 +15,17 @@
 
 // [START classroom_create_guardian_invitation_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.GuardianInvitation;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
 import java.util.Collections;
+import java.util.List;
 
 /* Class to demonstrate the use of Classroom Create Guardian Invitation API. */
 public class CreateGuardianInvitation {
@@ -34,22 +33,24 @@ public class CreateGuardianInvitation {
    * Creates a guardian invitation by sending an email to the guardian for confirmation.
    *
    * @param studentId - the id of the student.
+   * @param guardianEmail - email to send the guardian invitation to.
    * @return - the newly created guardian invitation.
    * @throws IOException - if credentials file not found.
    */
-  public static GuardianInvitation createGuardianInvitation(String studentId) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static GuardianInvitation createGuardianInvitation(String studentId, String guardianEmail)
+      throws Exception {
 
-    // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+    /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+    final List<String> SCOPES =
+        Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
+
+    // Create the classroom API client
+    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        requestInitializer)
+        classroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
         .setApplicationName("Classroom samples")
         .build();
 
@@ -62,14 +63,14 @@ public static GuardianInvitation createGuardianInvitation(String studentId) thro
     for other possible states of guardian invitations. */
     GuardianInvitation content = new GuardianInvitation()
         .setStudentId(studentId)
-        .setInvitationId("guardian@gmail.com")
+        .setInvitedEmailAddress(guardianEmail)
         .setState("PENDING");
     try {
       guardianInvitation = service.userProfiles().guardianInvitations()
           .create(studentId, content)
           .execute();
 
-      System.out.printf("Invitation created: %s", guardianInvitation.getInvitationId());
+      System.out.printf("Invitation created: %s\n", guardianInvitation.getInvitationId());
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
diff --git a/classroom/snippets/src/main/java/DeleteGuardian.java b/classroom/snippets/src/main/java/DeleteGuardian.java
index 3cdd1f95..6d2ab1e5 100644
--- a/classroom/snippets/src/main/java/DeleteGuardian.java
+++ b/classroom/snippets/src/main/java/DeleteGuardian.java
@@ -15,17 +15,16 @@
 
 // [START classroom_delete_guardian_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
 import java.util.Collections;
+import java.util.List;
 
 /* Class to demonstrate the use of Classroom Delete Guardian API. */
 public class DeleteGuardian {
@@ -36,19 +35,18 @@ public class DeleteGuardian {
    * @param guardianId - the id of the guardian to delete.
    * @throws IOException - if credentials file not found.
    */
-  public static void deleteGuardian(String studentId, String guardianId) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static void deleteGuardian(String studentId, String guardianId) throws Exception {
+    /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+    final List<String> SCOPES =
+        Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
 
-    // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+    // Create the classroom API client
+    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        requestInitializer)
+        classroomCredentials.getCredentials(HTTP_TRANSPORT,SCOPES))
         .setApplicationName("Classroom samples")
         .build();
 
diff --git a/classroom/snippets/src/main/java/GetGuardian.java b/classroom/snippets/src/main/java/GetGuardian.java
new file mode 100644
index 00000000..2617799d
--- /dev/null
+++ b/classroom/snippets/src/main/java/GetGuardian.java
@@ -0,0 +1,75 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// [START classroom_get_guardian_class]
+
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.Guardian;
+import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
+
+/* Class to demonstrate the use of Classroom Get Guardian API. */
+public class GetGuardian {
+  /**
+   * Retrieve a guardian for a specific student.
+   *
+   * @param studentId - the id of the student the guardian belongs to.
+   * @param guardianId - the id of the guardian to delete.
+   * @throws IOException - if credentials file not found.
+   */
+  public static void getGuardian(String studentId, String guardianId) throws Exception {
+    /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+    final List<String> SCOPES =
+        Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
+
+    // Create the classroom API client
+    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
+        GsonFactory.getDefaultInstance(),
+        classroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+        .setApplicationName("Classroom samples")
+        .build();
+
+    // [START classroom_get_guardian_code_snippet]
+    Guardian guardian = null;
+
+    try {
+      guardian = service.userProfiles().guardians().get(studentId, guardianId)
+          .execute();
+      System.out.printf("Guardian retrieved: %s", guardian.getInvitedEmailAddress());
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.err.printf("There is no record of guardianId (%s).\n", guardianId);
+        throw e;
+      } else {
+        throw e;
+      }
+    } catch (Exception e) {
+      throw e;
+    }
+    // [END classroom_get_guardian_code_snippet]
+  }
+}
+// [END classroom_get_guardian_class]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
index d7a3d91e..999ec3a5 100644
--- a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
+++ b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
@@ -15,17 +15,15 @@
 
 // [START classroom_list_guardian_invitations_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.GuardianInvitation;
 import com.google.api.services.classroom.model.ListGuardianInvitationsResponse;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -41,19 +39,19 @@ public class ListGuardianInvitationsByStudent {
    * @throws IOException - if credentials file not found.
    */
   public static List<GuardianInvitation> listGuardianInvitationsByStudent(String studentId)
-      throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS_READONLY));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+      throws Exception {
 
-    // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+    /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+    final List<String> SCOPES =
+        Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
+
+    // Create the classroom API client
+    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        requestInitializer)
+        classroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
         .setApplicationName("Classroom samples")
         .build();
 
@@ -78,7 +76,7 @@ public static List<GuardianInvitation> listGuardianInvitationsByStudent(String s
         System.out.println("No guardian invitations found.");
       } else {
         for (GuardianInvitation invitation : guardianInvitations) {
-          System.out.printf("Guardian invitation: %s\n", invitation.getInvitedEmailAddress());
+          System.out.printf("Guardian invitation id: %s\n", invitation.getInvitationId());
         }
       }
     } catch (GoogleJsonResponseException e) {
diff --git a/classroom/snippets/src/main/java/ListGuardians.java b/classroom/snippets/src/main/java/ListGuardians.java
index a11d993c..ebc16b41 100644
--- a/classroom/snippets/src/main/java/ListGuardians.java
+++ b/classroom/snippets/src/main/java/ListGuardians.java
@@ -15,17 +15,15 @@
 
 // [START classroom_list_guardians_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Guardian;
 import com.google.api.services.classroom.model.ListGuardiansResponse;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -40,19 +38,16 @@ public class ListGuardians {
    * @return a list of active guardians for a specific student.
    * @throws IOException - if credentials file not found.
    */
-  public static List<Guardian> listGuardians(String studentId) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS_READONLY));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static List<Guardian> listGuardians(String studentId) throws Exception {
+    /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+    final List<String> SCOPES =
+        Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
 
-    // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        requestInitializer)
+        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
         .setApplicationName("Classroom samples")
         .build();
 
@@ -77,8 +72,9 @@ public static List<Guardian> listGuardians(String studentId) throws IOException
         System.out.println("No guardians found.");
       } else {
         for (Guardian guardian : guardians) {
-          System.out.printf("Guardian name: %s, guardian email: %s\n",
+          System.out.printf("Guardian name: %s, guardian id: %s, guardian email: %s\n",
               guardian.getGuardianProfile().getName().getFullName(),
+              guardian.getGuardianId(),
               guardian.getInvitedEmailAddress());
         }
       }
diff --git a/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java b/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
new file mode 100644
index 00000000..20bd36f6
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
@@ -0,0 +1,31 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.GuardianInvitation;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for Cancel Guardian Invitation classroom snippet
+public class TestCancelGuardianInvitation {
+
+  @Test
+  public void testCancelGuardianInvitation() throws Exception {
+    String studentId = "insert_student_id";
+    String invitationId = "insert_invitation_id";
+    GuardianInvitation guardianInvitation = CancelGuardianInvitation.cancelGuardianInvitation(studentId,
+        invitationId);
+
+    Assert.assertTrue("Guardian invitation not canceled.", guardianInvitation != null);
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestCreateGuardianInvitation.java b/classroom/snippets/src/test/java/TestCreateGuardianInvitation.java
new file mode 100644
index 00000000..a87c3fb1
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestCreateGuardianInvitation.java
@@ -0,0 +1,31 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.GuardianInvitation;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for Create Guardian Invitation classroom snippet
+public class TestCreateGuardianInvitation {
+
+  @Test
+  public void testCreateGuardianInvitation() throws Exception {
+    String studentId = "insert_student_id";
+    String guardianEmail = "insert_guardian_email";
+    GuardianInvitation guardianInvitation = CreateGuardianInvitation.createGuardianInvitation(studentId,
+        guardianEmail);
+
+    Assert.assertTrue("Guardian invitation not created.", guardianInvitation != null);
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestDeleteGuardian.java b/classroom/snippets/src/test/java/TestDeleteGuardian.java
new file mode 100644
index 00000000..ba5a5105
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestDeleteGuardian.java
@@ -0,0 +1,31 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import org.junit.Assert;
+import org.junit.Test;
+
+// Unit test class for Delete Guardian classroom snippet
+public class TestDeleteGuardian {
+
+  @Test
+  public void testDeleteGuardian() throws Exception {
+    String studentId = "insert_student_id";
+    String guardianId = "insert_guardian_id";
+    DeleteGuardian.deleteGuardian(studentId, guardianId);
+
+    Assert.assertThrows("Not found", GoogleJsonResponseException.class, () ->
+        GetGuardian.getGuardian(studentId, guardianId));
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java b/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
index af5e64cb..1cc45dd3 100644
--- a/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
+++ b/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.GuardianInvitation;
-import java.io.IOException;
 import java.util.List;
 import org.junit.Assert;
 import org.junit.Test;
@@ -22,7 +21,7 @@
 public class TestListGuardianInvitationsByStudent {
 
   @Test
-  public void testGuardianInvitationsByStudent() throws IOException {
+  public void testListGuardianInvitationsByStudent() throws Exception {
     String studentId = "insert_student_id";
     List<GuardianInvitation> invitationList = ListGuardianInvitationsByStudent
         .listGuardianInvitationsByStudent(studentId);
diff --git a/classroom/snippets/src/test/java/TestListGuardians.java b/classroom/snippets/src/test/java/TestListGuardians.java
index 86b4222d..3d6c008c 100644
--- a/classroom/snippets/src/test/java/TestListGuardians.java
+++ b/classroom/snippets/src/test/java/TestListGuardians.java
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.Guardian;
-import java.io.IOException;
 import java.util.List;
 import org.junit.Assert;
 import org.junit.Test;
@@ -22,7 +21,7 @@
 public class TestListGuardians {
 
   @Test
-  public void testListGuardians() throws IOException {
+  public void testListGuardians() throws Exception {
     String studentId = "insert_student_id";
     List<Guardian> guardianList = ListGuardians.listGuardians(studentId);
 

From 448fe9a96bfd72e3ffb84b4b05b0e5ac97c005fc Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Wed, 21 Dec 2022 15:47:15 -0600
Subject: [PATCH 16/50] base test updates

---
 .../snippets/src/test/java/BaseTest.java      | 29 +++++++++----------
 1 file changed, 14 insertions(+), 15 deletions(-)

diff --git a/classroom/snippets/src/test/java/BaseTest.java b/classroom/snippets/src/test/java/BaseTest.java
index cc3996de..878d5015 100644
--- a/classroom/snippets/src/test/java/BaseTest.java
+++ b/classroom/snippets/src/test/java/BaseTest.java
@@ -14,15 +14,15 @@
  * limitations under the License.
  */
 
-import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Course;
 import com.google.api.services.classroom.model.CourseAlias;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
+import java.util.Collections;
+import java.util.List;
 import org.junit.After;
 import org.junit.Before;
 
@@ -40,27 +40,26 @@ public class BaseTest {
    * @return an authorized Classroom client service
    * @throws IOException - if credentials file not found.
    */
-  protected Classroom buildService() throws IOException {
-        /* Load pre-authorized user credentials from the environment.
-           TODO(developer) - See https://developers.google.com/identity for
-            guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(ClassroomScopes.CLASSROOM_ROSTERS);
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  protected Classroom buildService() throws Exception {
+    /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+    final List<String> SCOPES =
+        Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
 
     // Create the classroom API client
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
+    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom Snippets")
+        classroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+        .setApplicationName("Classroom samples")
         .build();
 
     return service;
   }
 
   @Before
-  public void setup() throws IOException {
+  public void setup() throws Exception {
     this.service = buildService();
     this.testCourse = CreateCourse.createCourse();
     createAlias(this.testCourse.getId());

From 25efd520ec03bd0f581c24aebed1ae831d1bc0c7 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Mon, 9 Jan 2023 13:25:32 -0500
Subject: [PATCH 17/50] updates based on team feedback

---
 classroom/snippets/build.gradle               |  4 +++
 .../main/java/CancelGuardianInvitation.java   |  3 +-
 .../src/main/java/ClassroomCredentials.java   | 15 ++++++++-
 .../main/java/CreateGuardianInvitation.java   |  3 +-
 .../src/main/java/DeleteGuardian.java         |  4 +--
 .../snippets/src/main/java/GetGuardian.java   |  3 +-
 .../ListGuardianInvitationsByStudent.java     |  5 +--
 .../snippets/src/main/java/ListGuardians.java |  2 ++
 .../src/main/java/ListStudentSubmissions.java | 31 ++++++++++++++-----
 .../src/main/java/ListSubmissions.java        | 28 ++++++++++++++---
 .../snippets/src/main/java/ListTopics.java    |  2 ++
 .../java/TestCancelGuardianInvitation.java    | 10 ++++--
 .../src/test/java/TestDeleteGuardian.java     |  2 +-
 13 files changed, 86 insertions(+), 26 deletions(-)

diff --git a/classroom/snippets/build.gradle b/classroom/snippets/build.gradle
index 7e19291b..8def0b0f 100644
--- a/classroom/snippets/build.gradle
+++ b/classroom/snippets/build.gradle
@@ -10,6 +10,10 @@ dependencies {
     implementation 'com.google.oauth-client:google-oauth-client-jetty:1.34.1'
     implementation 'com.google.apis:google-api-services-classroom:v1-rev20220323-2.0.0'
     testImplementation 'junit:junit:4.13.2'
+
+    /** This will be removed once all the classes have been updated to use the
+     * ClassroomCredentials class. */
+    implementation 'com.google.auth:google-auth-library-oauth2-http:1.11.0'
 }
 
 test {
diff --git a/classroom/snippets/src/main/java/CancelGuardianInvitation.java b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
index f6342eef..618c9f89 100644
--- a/classroom/snippets/src/main/java/CancelGuardianInvitation.java
+++ b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
@@ -45,11 +45,10 @@ public static GuardianInvitation cancelGuardianInvitation(String studentId, Stri
         Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
 
     // Create the classroom API client
-    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        classroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
         .setApplicationName("Classroom samples")
         .build();
 
diff --git a/classroom/snippets/src/main/java/ClassroomCredentials.java b/classroom/snippets/src/main/java/ClassroomCredentials.java
index 0818d90e..4f4f6c64 100644
--- a/classroom/snippets/src/main/java/ClassroomCredentials.java
+++ b/classroom/snippets/src/main/java/ClassroomCredentials.java
@@ -1,3 +1,17 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 import com.google.api.client.auth.oauth2.Credential;
 import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
 import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
@@ -16,7 +30,6 @@
 public class ClassroomCredentials {
   private static final JsonFactory JSON_FACTORY = GsonFactory.getDefaultInstance();
   private static final String TOKENS_DIRECTORY_PATH = "tokens";
-
   private static final String CREDENTIALS_FILE_PATH = "/credentials.json";
 
   /**
diff --git a/classroom/snippets/src/main/java/CreateGuardianInvitation.java b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
index 5a79e487..23f6b367 100644
--- a/classroom/snippets/src/main/java/CreateGuardianInvitation.java
+++ b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
@@ -46,11 +46,10 @@ public static GuardianInvitation createGuardianInvitation(String studentId, Stri
         Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
 
     // Create the classroom API client
-    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        classroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
         .setApplicationName("Classroom samples")
         .build();
 
diff --git a/classroom/snippets/src/main/java/DeleteGuardian.java b/classroom/snippets/src/main/java/DeleteGuardian.java
index 6d2ab1e5..1196b7ef 100644
--- a/classroom/snippets/src/main/java/DeleteGuardian.java
+++ b/classroom/snippets/src/main/java/DeleteGuardian.java
@@ -42,11 +42,10 @@ public static void deleteGuardian(String studentId, String guardianId) throws Ex
         Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
 
     // Create the classroom API client
-    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        classroomCredentials.getCredentials(HTTP_TRANSPORT,SCOPES))
+        ClassroomCredentials.getCredentials(HTTP_TRANSPORT,SCOPES))
         .setApplicationName("Classroom samples")
         .build();
 
@@ -54,6 +53,7 @@ public static void deleteGuardian(String studentId, String guardianId) throws Ex
     try {
       service.userProfiles().guardians().delete(studentId, guardianId)
           .execute();
+      System.out.printf("The guardian with id %s was deleted.\n", guardianId);
     } catch (GoogleJsonResponseException e) {
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
diff --git a/classroom/snippets/src/main/java/GetGuardian.java b/classroom/snippets/src/main/java/GetGuardian.java
index 2617799d..7fcd1792 100644
--- a/classroom/snippets/src/main/java/GetGuardian.java
+++ b/classroom/snippets/src/main/java/GetGuardian.java
@@ -43,11 +43,10 @@ public static void getGuardian(String studentId, String guardianId) throws Excep
         Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
 
     // Create the classroom API client
-    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        classroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
         .setApplicationName("Classroom samples")
         .build();
 
diff --git a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
index 999ec3a5..150d453c 100644
--- a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
+++ b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
@@ -47,11 +47,10 @@ public static List<GuardianInvitation> listGuardianInvitationsByStudent(String s
         Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
 
     // Create the classroom API client
-    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        classroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
         .setApplicationName("Classroom samples")
         .build();
 
@@ -64,8 +63,10 @@ public static List<GuardianInvitation> listGuardianInvitationsByStudent(String s
       do {
         ListGuardianInvitationsResponse response = service.userProfiles().guardianInvitations()
             .list(studentId)
+            .setPageToken(pageToken)
             .execute();
 
+        /* Ensure that the response is not null before retrieving data from it to avoid errors. */
         if (response.getGuardianInvitations() != null) {
           guardianInvitations.addAll(response.getGuardianInvitations());
           pageToken = response.getNextPageToken();
diff --git a/classroom/snippets/src/main/java/ListGuardians.java b/classroom/snippets/src/main/java/ListGuardians.java
index ebc16b41..bd2f1a13 100644
--- a/classroom/snippets/src/main/java/ListGuardians.java
+++ b/classroom/snippets/src/main/java/ListGuardians.java
@@ -60,8 +60,10 @@ public static List<Guardian> listGuardians(String studentId) throws Exception {
       do {
         ListGuardiansResponse response = service.userProfiles().guardians()
             .list(studentId)
+            .setPageToken(pageToken)
             .execute();
 
+        /* Ensure that the response is not null before retrieving data from it to avoid errors. */
         if (response.getGuardians() != null) {
           guardians.addAll(response.getGuardians());
           pageToken = response.getNextPageToken();
diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index 2243ec3c..0989945c 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -62,14 +62,31 @@ public static List<StudentSubmission> listStudentSubmissions(String courseId, St
     // [START classroom_list_student_submissions_code_snippet]
 
     List<StudentSubmission> studentSubmissions = new ArrayList<>();
+    String pageToken = null;
+
     try {
-      // Set the userId as a query parameter on the request.
-      ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
-          .list(courseId, courseWorkId)
-          .set("userId", userId)
-          .execute();
-      if (response.getStudentSubmissions() != null) {
-        studentSubmissions.addAll(response.getStudentSubmissions());
+      do {
+        // Set the userId as a query parameter on the request.
+        ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
+            .list(courseId, courseWorkId)
+            .setPageToken(pageToken)
+            .set("userId", userId)
+            .execute();
+
+        /* Ensure that the response is not null before retrieving data from it to avoid errors. */
+        if (response.getStudentSubmissions() != null) {
+          studentSubmissions.addAll(response.getStudentSubmissions());
+          pageToken = response.getNextPageToken();
+        }
+      } while (pageToken != null);
+
+      if (studentSubmissions.isEmpty()) {
+        System.out.println("No submissions found.");
+      } else {
+        System.out.println("Student submissions:");
+        for (StudentSubmission submission : studentSubmissions) {
+          System.out.printf("Submission id (%s)", submission.getId());
+        }
       }
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
diff --git a/classroom/snippets/src/main/java/ListSubmissions.java b/classroom/snippets/src/main/java/ListSubmissions.java
index dd0d8201..955726e0 100644
--- a/classroom/snippets/src/main/java/ListSubmissions.java
+++ b/classroom/snippets/src/main/java/ListSubmissions.java
@@ -61,12 +61,30 @@ public static List<StudentSubmission> listSubmissions(String courseId, String co
     // [START classroom_list_submissions_code_snippet]
 
     List<StudentSubmission> studentSubmissions = new ArrayList<>();
+    String pageToken = null;
+
     try {
-      ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
-          .list(courseId, courseWorkId)
-          .execute();
-      if (response.getStudentSubmissions() != null) {
-        studentSubmissions.addAll(response.getStudentSubmissions());
+      do {
+        ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
+            .list(courseId, courseWorkId)
+            .setPageToken(pageToken)
+            .execute();
+
+        /* Ensure that the response is not null before retrieving data from it to avoid errors. */
+        if (response.getStudentSubmissions() != null) {
+          studentSubmissions.addAll(response.getStudentSubmissions());
+          pageToken = response.getNextPageToken();
+        }
+      } while (pageToken != null);
+
+      if (studentSubmissions.isEmpty()) {
+        System.out.println("No submissions found.");
+      } else {
+        System.out.println("Submissions:");
+        for (StudentSubmission submission : studentSubmissions) {
+          System.out.printf("Submission id (%s) for user (%s)", submission.getId(),
+              submission.getUserId());
+        }
       }
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
diff --git a/classroom/snippets/src/main/java/ListTopics.java b/classroom/snippets/src/main/java/ListTopics.java
index e754f82b..251880cb 100644
--- a/classroom/snippets/src/main/java/ListTopics.java
+++ b/classroom/snippets/src/main/java/ListTopics.java
@@ -67,6 +67,8 @@ public static List<Topic> listTopics(String courseId) throws IOException {
             .setPageSize(100)
             .setPageToken(pageToken)
             .execute();
+
+        /* Ensure that the response is not null before retrieving data from it to avoid errors. */
         if (response.getTopic() != null) {
           topics.addAll(response.getTopic());
           pageToken = response.getNextPageToken();
diff --git a/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java b/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
index 20bd36f6..a2caa7b5 100644
--- a/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
+++ b/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
@@ -22,10 +22,16 @@ public class TestCancelGuardianInvitation {
   @Test
   public void testCancelGuardianInvitation() throws Exception {
     String studentId = "insert_student_id";
-    String invitationId = "insert_invitation_id";
+    String guardianEmail = "insert_guardian_email";
+
+    GuardianInvitation invitation = CreateGuardianInvitation.createGuardianInvitation(studentId,
+        guardianEmail);
+
     GuardianInvitation guardianInvitation = CancelGuardianInvitation.cancelGuardianInvitation(studentId,
-        invitationId);
+        invitation.getInvitationId());
 
     Assert.assertTrue("Guardian invitation not canceled.", guardianInvitation != null);
+    Assert.assertTrue("Guardian invitation state not updated.", guardianInvitation.getState()
+        .equals("COMPLETE"));
   }
 }
diff --git a/classroom/snippets/src/test/java/TestDeleteGuardian.java b/classroom/snippets/src/test/java/TestDeleteGuardian.java
index ba5a5105..371ec1f2 100644
--- a/classroom/snippets/src/test/java/TestDeleteGuardian.java
+++ b/classroom/snippets/src/test/java/TestDeleteGuardian.java
@@ -25,7 +25,7 @@ public void testDeleteGuardian() throws Exception {
     String guardianId = "insert_guardian_id";
     DeleteGuardian.deleteGuardian(studentId, guardianId);
 
-    Assert.assertThrows("Not found", GoogleJsonResponseException.class, () ->
+    Assert.assertThrows(GoogleJsonResponseException.class, () ->
         GetGuardian.getGuardian(studentId, guardianId));
   }
 }

From c0b8c1bb9d2bead4ce3ea51618150e4b32c65182 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Wed, 11 Jan 2023 15:45:48 -0500
Subject: [PATCH 18/50] fixing BaseTest.java

---
 classroom/snippets/src/test/java/BaseTest.java | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/classroom/snippets/src/test/java/BaseTest.java b/classroom/snippets/src/test/java/BaseTest.java
index 878d5015..8aa6749d 100644
--- a/classroom/snippets/src/test/java/BaseTest.java
+++ b/classroom/snippets/src/test/java/BaseTest.java
@@ -47,11 +47,10 @@ protected Classroom buildService() throws Exception {
         Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
 
     // Create the classroom API client
-    ClassroomCredentials classroomCredentials = new ClassroomCredentials();
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
         GsonFactory.getDefaultInstance(),
-        classroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
         .setApplicationName("Classroom samples")
         .build();
 

From 0b209ee9e41c836022c76edffbbca8e6084fd11a Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 17 Jan 2023 10:54:40 -0500
Subject: [PATCH 19/50] updating copyright year to 2023 for new files

---
 classroom/snippets/src/main/java/CancelGuardianInvitation.java  | 2 +-
 classroom/snippets/src/main/java/ClassroomCredentials.java      | 2 +-
 classroom/snippets/src/main/java/CreateGuardianInvitation.java  | 2 +-
 classroom/snippets/src/main/java/DeleteGuardian.java            | 2 +-
 classroom/snippets/src/main/java/GetGuardian.java               | 2 +-
 .../src/main/java/ListGuardianInvitationsByStudent.java         | 2 +-
 classroom/snippets/src/main/java/ListGuardians.java             | 2 +-
 .../snippets/src/test/java/TestCancelGuardianInvitation.java    | 2 +-
 .../snippets/src/test/java/TestCreateGuardianInvitation.java    | 2 +-
 classroom/snippets/src/test/java/TestDeleteGuardian.java        | 2 +-
 .../src/test/java/TestListGuardianInvitationsByStudent.java     | 2 +-
 classroom/snippets/src/test/java/TestListGuardians.java         | 2 +-
 12 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/classroom/snippets/src/main/java/CancelGuardianInvitation.java b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
index 618c9f89..02fd6732 100644
--- a/classroom/snippets/src/main/java/CancelGuardianInvitation.java
+++ b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/classroom/snippets/src/main/java/ClassroomCredentials.java b/classroom/snippets/src/main/java/ClassroomCredentials.java
index 4f4f6c64..ac132fcf 100644
--- a/classroom/snippets/src/main/java/ClassroomCredentials.java
+++ b/classroom/snippets/src/main/java/ClassroomCredentials.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/classroom/snippets/src/main/java/CreateGuardianInvitation.java b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
index 23f6b367..004a6661 100644
--- a/classroom/snippets/src/main/java/CreateGuardianInvitation.java
+++ b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/classroom/snippets/src/main/java/DeleteGuardian.java b/classroom/snippets/src/main/java/DeleteGuardian.java
index 1196b7ef..78a05684 100644
--- a/classroom/snippets/src/main/java/DeleteGuardian.java
+++ b/classroom/snippets/src/main/java/DeleteGuardian.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/classroom/snippets/src/main/java/GetGuardian.java b/classroom/snippets/src/main/java/GetGuardian.java
index 7fcd1792..e820a109 100644
--- a/classroom/snippets/src/main/java/GetGuardian.java
+++ b/classroom/snippets/src/main/java/GetGuardian.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
index 150d453c..e6b61d36 100644
--- a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
+++ b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/classroom/snippets/src/main/java/ListGuardians.java b/classroom/snippets/src/main/java/ListGuardians.java
index bd2f1a13..90206e1b 100644
--- a/classroom/snippets/src/main/java/ListGuardians.java
+++ b/classroom/snippets/src/main/java/ListGuardians.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java b/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
index a2caa7b5..95c5a801 100644
--- a/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
+++ b/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/classroom/snippets/src/test/java/TestCreateGuardianInvitation.java b/classroom/snippets/src/test/java/TestCreateGuardianInvitation.java
index a87c3fb1..6e2bbe0d 100644
--- a/classroom/snippets/src/test/java/TestCreateGuardianInvitation.java
+++ b/classroom/snippets/src/test/java/TestCreateGuardianInvitation.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/classroom/snippets/src/test/java/TestDeleteGuardian.java b/classroom/snippets/src/test/java/TestDeleteGuardian.java
index 371ec1f2..61c4ef15 100644
--- a/classroom/snippets/src/test/java/TestDeleteGuardian.java
+++ b/classroom/snippets/src/test/java/TestDeleteGuardian.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java b/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
index 1cc45dd3..157f3608 100644
--- a/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
+++ b/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/classroom/snippets/src/test/java/TestListGuardians.java b/classroom/snippets/src/test/java/TestListGuardians.java
index 3d6c008c..3d389359 100644
--- a/classroom/snippets/src/test/java/TestListGuardians.java
+++ b/classroom/snippets/src/test/java/TestListGuardians.java
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

From 1cfb9391a2df8dac33e070fcc1d327a5dc174f3d Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 17 Jan 2023 11:23:56 -0500
Subject: [PATCH 20/50] testing google-java-format plugin to fix lint errors

---
 .../main/java/CancelGuardianInvitation.java   | 45 ++++++++++---------
 1 file changed, 25 insertions(+), 20 deletions(-)

diff --git a/classroom/snippets/src/main/java/CancelGuardianInvitation.java b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
index 02fd6732..33585400 100644
--- a/classroom/snippets/src/main/java/CancelGuardianInvitation.java
+++ b/classroom/snippets/src/main/java/CancelGuardianInvitation.java
@@ -46,11 +46,13 @@ public static GuardianInvitation cancelGuardianInvitation(String studentId, Stri
 
     // Create the classroom API client
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
-    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
-        GsonFactory.getDefaultInstance(),
-        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
-        .setApplicationName("Classroom samples")
-        .build();
+    Classroom service =
+        new Classroom.Builder(
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_cancel_guardian_invitation_code_snippet]
 
@@ -58,26 +60,29 @@ public static GuardianInvitation cancelGuardianInvitation(String studentId, Stri
 
     try {
       /* Change the state of the GuardianInvitation from PENDING to COMPLETE. See
-    https://developers.google.com/classroom/reference/rest/v1/userProfiles.guardianInvitations#guardianinvitationstate
-    for other possible states of guardian invitations. */
-      GuardianInvitation content = service.userProfiles().guardianInvitations()
-          .get(studentId, invitationId)
-          .execute();
+      https://developers.google.com/classroom/reference/rest/v1/userProfiles.guardianInvitations#guardianinvitationstate
+      for other possible states of guardian invitations. */
+      GuardianInvitation content =
+          service.userProfiles().guardianInvitations().get(studentId, invitationId).execute();
       content.setState("COMPLETE");
 
-      guardianInvitation = service.userProfiles().guardianInvitations()
-          .patch(studentId, invitationId, content)
-          .set("updateMask", "state")
-          .execute();
+      guardianInvitation =
+          service
+              .userProfiles()
+              .guardianInvitations()
+              .patch(studentId, invitationId, content)
+              .set("updateMask", "state")
+              .execute();
 
-      System.out.printf("Invitation (%s) state set to %s\n.", guardianInvitation.getInvitationId(),
-          guardianInvitation.getState());
+      System.out.printf(
+          "Invitation (%s) state set to %s\n.",
+          guardianInvitation.getInvitationId(), guardianInvitation.getState());
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
-        System.out.printf("There is no record of studentId (%s) or invitationId (%s).", studentId,
-            invitationId);
+        System.out.printf(
+            "There is no record of studentId (%s) or invitationId (%s).", studentId, invitationId);
       } else {
         throw e;
       }
@@ -89,4 +94,4 @@ public static GuardianInvitation cancelGuardianInvitation(String studentId, Stri
     // [END classroom_cancel_guardian_invitation_code_snippet]
   }
 }
-// [END classroom_cancel_guardian_invitation_class]
\ No newline at end of file
+// [END classroom_cancel_guardian_invitation_class]

From 0e91d79b5132288c0f2b1d66e1da18aeb0d5ecb0 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 17 Jan 2023 11:41:18 -0500
Subject: [PATCH 21/50] updated files after running google-java-format plugin

---
 .../src/main/java/ClassroomCredentials.java   | 15 +++---
 .../main/java/CreateGuardianInvitation.java   | 31 ++++++------
 .../src/main/java/DeleteGuardian.java         | 18 +++----
 .../snippets/src/main/java/GetGuardian.java   | 18 +++----
 .../ListGuardianInvitationsByStudent.java     | 24 +++++----
 .../snippets/src/main/java/ListGuardians.java | 22 ++++----
 .../src/main/java/ListStudentSubmissions.java | 50 ++++++++++---------
 .../src/main/java/ListSubmissions.java        | 48 ++++++++++--------
 .../snippets/src/main/java/ListTopics.java    | 37 +++++++-------
 .../snippets/src/test/java/BaseTest.java      | 15 +++---
 .../java/TestCancelGuardianInvitation.java    | 12 ++---
 .../java/TestCreateGuardianInvitation.java    |  4 +-
 .../src/test/java/TestDeleteGuardian.java     |  4 +-
 .../TestListGuardianInvitationsByStudent.java |  4 +-
 .../src/test/java/TestListGuardians.java      |  1 -
 15 files changed, 159 insertions(+), 144 deletions(-)

diff --git a/classroom/snippets/src/main/java/ClassroomCredentials.java b/classroom/snippets/src/main/java/ClassroomCredentials.java
index ac132fcf..70cd5d94 100644
--- a/classroom/snippets/src/main/java/ClassroomCredentials.java
+++ b/classroom/snippets/src/main/java/ClassroomCredentials.java
@@ -40,8 +40,7 @@ public class ClassroomCredentials {
    * @return An authorized Credential object.
    * @throws IOException If the credentials.json file cannot be found.
    */
-  static Credential getCredentials(final NetHttpTransport HTTP_TRANSPORT,
-      Collection SCOPES)
+  static Credential getCredentials(final NetHttpTransport HTTP_TRANSPORT, Collection SCOPES)
       throws IOException {
     // Load client secrets.
     InputStream in = ClassroomCredentials.class.getResourceAsStream(CREDENTIALS_FILE_PATH);
@@ -53,13 +52,13 @@ static Credential getCredentials(final NetHttpTransport HTTP_TRANSPORT,
         GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));
 
     // Build flow and trigger user authorization request.
-    GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
-        HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
-        .setDataStoreFactory(new FileDataStoreFactory(new java.io.File(TOKENS_DIRECTORY_PATH)))
-        .setAccessType("offline")
-        .build();
+    GoogleAuthorizationCodeFlow flow =
+        new GoogleAuthorizationCodeFlow.Builder(HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
+            .setDataStoreFactory(new FileDataStoreFactory(new java.io.File(TOKENS_DIRECTORY_PATH)))
+            .setAccessType("offline")
+            .build();
 
     LocalServerReceiver receiver = new LocalServerReceiver.Builder().setPort(8888).build();
     return new AuthorizationCodeInstalledApp(flow, receiver).authorize("user");
   }
-}
\ No newline at end of file
+}
diff --git a/classroom/snippets/src/main/java/CreateGuardianInvitation.java b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
index 004a6661..cb3fe374 100644
--- a/classroom/snippets/src/main/java/CreateGuardianInvitation.java
+++ b/classroom/snippets/src/main/java/CreateGuardianInvitation.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_create_guardian_invitation_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -47,11 +46,13 @@ public static GuardianInvitation createGuardianInvitation(String studentId, Stri
 
     // Create the classroom API client
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
-    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
-        GsonFactory.getDefaultInstance(),
-        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
-        .setApplicationName("Classroom samples")
-        .build();
+    Classroom service =
+        new Classroom.Builder(
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_create_guardian_invitation_code_snippet]
 
@@ -60,18 +61,18 @@ public static GuardianInvitation createGuardianInvitation(String studentId, Stri
     /* Create a GuardianInvitation object with state set to PENDING. See
     https://developers.google.com/classroom/reference/rest/v1/userProfiles.guardianInvitations#guardianinvitationstate
     for other possible states of guardian invitations. */
-    GuardianInvitation content = new GuardianInvitation()
-        .setStudentId(studentId)
-        .setInvitedEmailAddress(guardianEmail)
-        .setState("PENDING");
+    GuardianInvitation content =
+        new GuardianInvitation()
+            .setStudentId(studentId)
+            .setInvitedEmailAddress(guardianEmail)
+            .setState("PENDING");
     try {
-      guardianInvitation = service.userProfiles().guardianInvitations()
-          .create(studentId, content)
-          .execute();
+      guardianInvitation =
+          service.userProfiles().guardianInvitations().create(studentId, content).execute();
 
       System.out.printf("Invitation created: %s\n", guardianInvitation.getInvitationId());
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf("There is no record of studentId: %s", studentId);
@@ -86,4 +87,4 @@ public static GuardianInvitation createGuardianInvitation(String studentId, Stri
     // [END classroom_create_guardian_invitation_code_snippet]
   }
 }
-// [END classroom_create_guardian_invitation_class]
\ No newline at end of file
+// [END classroom_create_guardian_invitation_class]
diff --git a/classroom/snippets/src/main/java/DeleteGuardian.java b/classroom/snippets/src/main/java/DeleteGuardian.java
index 78a05684..7cc67a23 100644
--- a/classroom/snippets/src/main/java/DeleteGuardian.java
+++ b/classroom/snippets/src/main/java/DeleteGuardian.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_delete_guardian_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -43,16 +42,17 @@ public static void deleteGuardian(String studentId, String guardianId) throws Ex
 
     // Create the classroom API client
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
-    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
-        GsonFactory.getDefaultInstance(),
-        ClassroomCredentials.getCredentials(HTTP_TRANSPORT,SCOPES))
-        .setApplicationName("Classroom samples")
-        .build();
+    Classroom service =
+        new Classroom.Builder(
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_delete_guardian_code_snippet]
     try {
-      service.userProfiles().guardians().delete(studentId, guardianId)
-          .execute();
+      service.userProfiles().guardians().delete(studentId, guardianId).execute();
       System.out.printf("The guardian with id %s was deleted.\n", guardianId);
     } catch (GoogleJsonResponseException e) {
       GoogleJsonError error = e.getDetails();
@@ -63,4 +63,4 @@ public static void deleteGuardian(String studentId, String guardianId) throws Ex
     // [END classroom_delete_guardian_code_snippet]
   }
 }
-// [END classroom_delete_guardian_class]
\ No newline at end of file
+// [END classroom_delete_guardian_class]
diff --git a/classroom/snippets/src/main/java/GetGuardian.java b/classroom/snippets/src/main/java/GetGuardian.java
index e820a109..781b6728 100644
--- a/classroom/snippets/src/main/java/GetGuardian.java
+++ b/classroom/snippets/src/main/java/GetGuardian.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_get_guardian_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -44,18 +43,19 @@ public static void getGuardian(String studentId, String guardianId) throws Excep
 
     // Create the classroom API client
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
-    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
-        GsonFactory.getDefaultInstance(),
-        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
-        .setApplicationName("Classroom samples")
-        .build();
+    Classroom service =
+        new Classroom.Builder(
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_get_guardian_code_snippet]
     Guardian guardian = null;
 
     try {
-      guardian = service.userProfiles().guardians().get(studentId, guardianId)
-          .execute();
+      guardian = service.userProfiles().guardians().get(studentId, guardianId).execute();
       System.out.printf("Guardian retrieved: %s", guardian.getInvitedEmailAddress());
     } catch (GoogleJsonResponseException e) {
       GoogleJsonError error = e.getDetails();
@@ -71,4 +71,4 @@ public static void getGuardian(String studentId, String guardianId) throws Excep
     // [END classroom_get_guardian_code_snippet]
   }
 }
-// [END classroom_get_guardian_class]
\ No newline at end of file
+// [END classroom_get_guardian_class]
diff --git a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
index e6b61d36..b565f44d 100644
--- a/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
+++ b/classroom/snippets/src/main/java/ListGuardianInvitationsByStudent.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_list_guardian_invitations_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -48,11 +47,13 @@ public static List<GuardianInvitation> listGuardianInvitationsByStudent(String s
 
     // Create the classroom API client
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
-    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
-        GsonFactory.getDefaultInstance(),
-        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
-        .setApplicationName("Classroom samples")
-        .build();
+    Classroom service =
+        new Classroom.Builder(
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_list_guardian_invitations_code_snippet]
 
@@ -61,10 +62,13 @@ public static List<GuardianInvitation> listGuardianInvitationsByStudent(String s
 
     try {
       do {
-        ListGuardianInvitationsResponse response = service.userProfiles().guardianInvitations()
-            .list(studentId)
-            .setPageToken(pageToken)
-            .execute();
+        ListGuardianInvitationsResponse response =
+            service
+                .userProfiles()
+                .guardianInvitations()
+                .list(studentId)
+                .setPageToken(pageToken)
+                .execute();
 
         /* Ensure that the response is not null before retrieving data from it to avoid errors. */
         if (response.getGuardianInvitations() != null) {
diff --git a/classroom/snippets/src/main/java/ListGuardians.java b/classroom/snippets/src/main/java/ListGuardians.java
index 90206e1b..1cb87014 100644
--- a/classroom/snippets/src/main/java/ListGuardians.java
+++ b/classroom/snippets/src/main/java/ListGuardians.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_list_guardians_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -45,11 +44,13 @@ public static List<Guardian> listGuardians(String studentId) throws Exception {
         Collections.singletonList(ClassroomScopes.CLASSROOM_GUARDIANLINKS_STUDENTS);
 
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
-    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
-        GsonFactory.getDefaultInstance(),
-        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
-        .setApplicationName("Classroom samples")
-        .build();
+    Classroom service =
+        new Classroom.Builder(
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_list_guardians_code_snippet]
 
@@ -58,10 +59,8 @@ public static List<Guardian> listGuardians(String studentId) throws Exception {
 
     try {
       do {
-        ListGuardiansResponse response = service.userProfiles().guardians()
-            .list(studentId)
-            .setPageToken(pageToken)
-            .execute();
+        ListGuardiansResponse response =
+            service.userProfiles().guardians().list(studentId).setPageToken(pageToken).execute();
 
         /* Ensure that the response is not null before retrieving data from it to avoid errors. */
         if (response.getGuardians() != null) {
@@ -74,7 +73,8 @@ public static List<Guardian> listGuardians(String studentId) throws Exception {
         System.out.println("No guardians found.");
       } else {
         for (Guardian guardian : guardians) {
-          System.out.printf("Guardian name: %s, guardian id: %s, guardian email: %s\n",
+          System.out.printf(
+              "Guardian name: %s, guardian id: %s, guardian email: %s\n",
               guardian.getGuardianProfile().getName().getFullName(),
               guardian.getGuardianId(),
               guardian.getInvitedEmailAddress());
diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index 639e8c7b..c5d8b29f 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_list_student_submissions_class]
 
 import com.google.api.client.googleapis.json.GoogleJsonError;
@@ -42,22 +41,22 @@ public class ListStudentSubmissions {
    * @return - list of student submissions.
    * @throws IOException - if credentials file not found.
    */
-  public static List<StudentSubmission> listStudentSubmissions(String courseId, String courseWorkId,
-      String userId) throws IOException {
+  public static List<StudentSubmission> listStudentSubmissions(
+      String courseId, String courseWorkId, String userId) throws IOException {
     /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+    TODO(developer) - See https://developers.google.com/identity for
+     guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials =
+        GoogleCredentials.getApplicationDefault()
+            .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(credentials);
 
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    Classroom service =
+        new Classroom.Builder(
+                new NetHttpTransport(), GsonFactory.getDefaultInstance(), requestInitializer)
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_list_student_submissions_code_snippet]
 
@@ -67,11 +66,15 @@ public static List<StudentSubmission> listStudentSubmissions(String courseId, St
     try {
       do {
         // Set the userId as a query parameter on the request.
-        ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
-            .list(courseId, courseWorkId)
-            .setPageToken(pageToken)
-            .set("userId", userId)
-            .execute();
+        ListStudentSubmissionsResponse response =
+            service
+                .courses()
+                .courseWork()
+                .studentSubmissions()
+                .list(courseId, courseWorkId)
+                .setPageToken(pageToken)
+                .set("userId", userId)
+                .execute();
 
         /* Ensure that the response is not null before retrieving data from it to avoid errors. */
         if (response.getStudentSubmissions() != null) {
@@ -88,11 +91,12 @@ public static List<StudentSubmission> listStudentSubmissions(String courseId, St
         }
       }
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
-        System.out.printf("The courseId (%s), courseWorkId (%s), or userId (%s) does "
-            + "not exist.\n", courseId, courseWorkId, userId);
+        System.out.printf(
+            "The courseId (%s), courseWorkId (%s), or userId (%s) does " + "not exist.\n",
+            courseId, courseWorkId, userId);
       } else {
         throw e;
       }
@@ -105,4 +109,4 @@ public static List<StudentSubmission> listStudentSubmissions(String courseId, St
 
   }
 }
-// [END classroom_list_student_submissions_class]
\ No newline at end of file
+// [END classroom_list_student_submissions_class]
diff --git a/classroom/snippets/src/main/java/ListSubmissions.java b/classroom/snippets/src/main/java/ListSubmissions.java
index 031eb5a1..d5356d70 100644
--- a/classroom/snippets/src/main/java/ListSubmissions.java
+++ b/classroom/snippets/src/main/java/ListSubmissions.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_list_submissions_class]
 
 import com.google.api.client.googleapis.json.GoogleJsonError;
@@ -44,19 +43,19 @@ public class ListSubmissions {
   public static List<StudentSubmission> listSubmissions(String courseId, String courseWorkId)
       throws IOException {
     /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+    TODO(developer) - See https://developers.google.com/identity for
+     guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials =
+        GoogleCredentials.getApplicationDefault()
+            .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(credentials);
 
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    Classroom service =
+        new Classroom.Builder(
+                new NetHttpTransport(), GsonFactory.getDefaultInstance(), requestInitializer)
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_list_submissions_code_snippet]
 
@@ -65,10 +64,14 @@ public static List<StudentSubmission> listSubmissions(String courseId, String co
 
     try {
       do {
-        ListStudentSubmissionsResponse response = service.courses().courseWork().studentSubmissions()
-            .list(courseId, courseWorkId)
-            .setPageToken(pageToken)
-            .execute();
+        ListStudentSubmissionsResponse response =
+            service
+                .courses()
+                .courseWork()
+                .studentSubmissions()
+                .list(courseId, courseWorkId)
+                .setPageToken(pageToken)
+                .execute();
 
         /* Ensure that the response is not null before retrieving data from it to avoid errors. */
         if (response.getStudentSubmissions() != null) {
@@ -81,16 +84,17 @@ public static List<StudentSubmission> listSubmissions(String courseId, String co
         System.out.println("No student submission found.");
       } else {
         for (StudentSubmission submission : studentSubmissions) {
-          System.out.printf("Student id (%s), student submission id (%s)\n", submission.getUserId(),
-              submission.getId());
+          System.out.printf(
+              "Student id (%s), student submission id (%s)\n",
+              submission.getUserId(), submission.getId());
         }
       }
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
-        System.out.printf("The courseId (%s) or courseWorkId (%s) does not exist.\n", courseId,
-            courseWorkId);
+        System.out.printf(
+            "The courseId (%s) or courseWorkId (%s) does not exist.\n", courseId, courseWorkId);
       } else {
         throw e;
       }
@@ -103,4 +107,4 @@ public static List<StudentSubmission> listSubmissions(String courseId, String co
 
   }
 }
-// [END classroom_list_submissions_class]
\ No newline at end of file
+// [END classroom_list_submissions_class]
diff --git a/classroom/snippets/src/main/java/ListTopics.java b/classroom/snippets/src/main/java/ListTopics.java
index 251880cb..6412a1cb 100644
--- a/classroom/snippets/src/main/java/ListTopics.java
+++ b/classroom/snippets/src/main/java/ListTopics.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_list_topic_class]
 
 import com.google.api.client.googleapis.json.GoogleJsonError;
@@ -42,19 +41,19 @@ public class ListTopics {
    */
   public static List<Topic> listTopics(String courseId) throws IOException {
     /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+    TODO(developer) - See https://developers.google.com/identity for
+     guides on implementing OAuth2 for your application. */
+    GoogleCredentials credentials =
+        GoogleCredentials.getApplicationDefault()
+            .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
+    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(credentials);
 
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    Classroom service =
+        new Classroom.Builder(
+                new NetHttpTransport(), GsonFactory.getDefaultInstance(), requestInitializer)
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_list_topic_code_snippet]
 
@@ -63,10 +62,14 @@ public static List<Topic> listTopics(String courseId) throws IOException {
 
     try {
       do {
-        ListTopicResponse response = service.courses().topics().list(courseId)
-            .setPageSize(100)
-            .setPageToken(pageToken)
-            .execute();
+        ListTopicResponse response =
+            service
+                .courses()
+                .topics()
+                .list(courseId)
+                .setPageSize(100)
+                .setPageToken(pageToken)
+                .execute();
 
         /* Ensure that the response is not null before retrieving data from it to avoid errors. */
         if (response.getTopic() != null) {
@@ -83,7 +86,7 @@ public static List<Topic> listTopics(String courseId) throws IOException {
         }
       }
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf("The courseId does not exist: %s.\n", courseId);
diff --git a/classroom/snippets/src/test/java/BaseTest.java b/classroom/snippets/src/test/java/BaseTest.java
index 8aa6749d..3a9758bb 100644
--- a/classroom/snippets/src/test/java/BaseTest.java
+++ b/classroom/snippets/src/test/java/BaseTest.java
@@ -43,16 +43,17 @@ public class BaseTest {
   protected Classroom buildService() throws Exception {
     /* Scopes required by this API call. If modifying these scopes, delete your previously saved
     tokens/ folder. */
-    final List<String> SCOPES =
-        Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
+    final List<String> SCOPES = Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
 
     // Create the classroom API client
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
-    Classroom service = new Classroom.Builder(HTTP_TRANSPORT,
-        GsonFactory.getDefaultInstance(),
-        ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
-        .setApplicationName("Classroom samples")
-        .build();
+    Classroom service =
+        new Classroom.Builder(
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     return service;
   }
diff --git a/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java b/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
index 95c5a801..d5ad35b4 100644
--- a/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
+++ b/classroom/snippets/src/test/java/TestCancelGuardianInvitation.java
@@ -24,14 +24,14 @@ public void testCancelGuardianInvitation() throws Exception {
     String studentId = "insert_student_id";
     String guardianEmail = "insert_guardian_email";
 
-    GuardianInvitation invitation = CreateGuardianInvitation.createGuardianInvitation(studentId,
-        guardianEmail);
+    GuardianInvitation invitation =
+        CreateGuardianInvitation.createGuardianInvitation(studentId, guardianEmail);
 
-    GuardianInvitation guardianInvitation = CancelGuardianInvitation.cancelGuardianInvitation(studentId,
-        invitation.getInvitationId());
+    GuardianInvitation guardianInvitation =
+        CancelGuardianInvitation.cancelGuardianInvitation(studentId, invitation.getInvitationId());
 
     Assert.assertTrue("Guardian invitation not canceled.", guardianInvitation != null);
-    Assert.assertTrue("Guardian invitation state not updated.", guardianInvitation.getState()
-        .equals("COMPLETE"));
+    Assert.assertTrue(
+        "Guardian invitation state not updated.", guardianInvitation.getState().equals("COMPLETE"));
   }
 }
diff --git a/classroom/snippets/src/test/java/TestCreateGuardianInvitation.java b/classroom/snippets/src/test/java/TestCreateGuardianInvitation.java
index 6e2bbe0d..bc98e2b9 100644
--- a/classroom/snippets/src/test/java/TestCreateGuardianInvitation.java
+++ b/classroom/snippets/src/test/java/TestCreateGuardianInvitation.java
@@ -23,8 +23,8 @@ public class TestCreateGuardianInvitation {
   public void testCreateGuardianInvitation() throws Exception {
     String studentId = "insert_student_id";
     String guardianEmail = "insert_guardian_email";
-    GuardianInvitation guardianInvitation = CreateGuardianInvitation.createGuardianInvitation(studentId,
-        guardianEmail);
+    GuardianInvitation guardianInvitation =
+        CreateGuardianInvitation.createGuardianInvitation(studentId, guardianEmail);
 
     Assert.assertTrue("Guardian invitation not created.", guardianInvitation != null);
   }
diff --git a/classroom/snippets/src/test/java/TestDeleteGuardian.java b/classroom/snippets/src/test/java/TestDeleteGuardian.java
index 61c4ef15..fc70bd08 100644
--- a/classroom/snippets/src/test/java/TestDeleteGuardian.java
+++ b/classroom/snippets/src/test/java/TestDeleteGuardian.java
@@ -25,7 +25,7 @@ public void testDeleteGuardian() throws Exception {
     String guardianId = "insert_guardian_id";
     DeleteGuardian.deleteGuardian(studentId, guardianId);
 
-    Assert.assertThrows(GoogleJsonResponseException.class, () ->
-        GetGuardian.getGuardian(studentId, guardianId));
+    Assert.assertThrows(
+        GoogleJsonResponseException.class, () -> GetGuardian.getGuardian(studentId, guardianId));
   }
 }
diff --git a/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java b/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
index 157f3608..0ee3390f 100644
--- a/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
+++ b/classroom/snippets/src/test/java/TestListGuardianInvitationsByStudent.java
@@ -23,8 +23,8 @@ public class TestListGuardianInvitationsByStudent {
   @Test
   public void testListGuardianInvitationsByStudent() throws Exception {
     String studentId = "insert_student_id";
-    List<GuardianInvitation> invitationList = ListGuardianInvitationsByStudent
-        .listGuardianInvitationsByStudent(studentId);
+    List<GuardianInvitation> invitationList =
+        ListGuardianInvitationsByStudent.listGuardianInvitationsByStudent(studentId);
 
     Assert.assertTrue("No guardian invitations returned.", invitationList.size() > 0);
   }
diff --git a/classroom/snippets/src/test/java/TestListGuardians.java b/classroom/snippets/src/test/java/TestListGuardians.java
index 3d389359..b1b5eb03 100644
--- a/classroom/snippets/src/test/java/TestListGuardians.java
+++ b/classroom/snippets/src/test/java/TestListGuardians.java
@@ -27,5 +27,4 @@ public void testListGuardians() throws Exception {
 
     Assert.assertTrue("No guardians returned.", guardianList.size() > 0);
   }
-
 }

From 09c634c4d09ae2c25a4ee35ed9d03d79f36145be Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 17 Jan 2023 11:47:11 -0500
Subject: [PATCH 22/50] updated BaseTest

---
 classroom/snippets/src/test/java/BaseTest.java | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/classroom/snippets/src/test/java/BaseTest.java b/classroom/snippets/src/test/java/BaseTest.java
index 3a9758bb..4fd032f1 100644
--- a/classroom/snippets/src/test/java/BaseTest.java
+++ b/classroom/snippets/src/test/java/BaseTest.java
@@ -47,15 +47,13 @@ protected Classroom buildService() throws Exception {
 
     // Create the classroom API client
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
-    Classroom service =
+    return service =
         new Classroom.Builder(
                 HTTP_TRANSPORT,
                 GsonFactory.getDefaultInstance(),
                 ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
-
-    return service;
   }
 
   @Before
@@ -71,11 +69,10 @@ public void tearDown() throws IOException {
     this.testCourse = null;
   }
 
-  public CourseAlias createAlias(String courseId) throws IOException {
+  public void createAlias(String courseId) throws IOException {
     String alias = "p:" + UUID.randomUUID();
     CourseAlias courseAlias = new CourseAlias().setAlias(alias);
-    courseAlias = this.service.courses().aliases().create(courseId, courseAlias).execute();
-    return courseAlias;
+    this.service.courses().aliases().create(courseId, courseAlias).execute();
   }
 
   public void deleteCourse(String courseId) throws IOException {

From fde753dbe34441b2ce7e54870af03552ff0c76f5 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 17 Jan 2023 11:56:59 -0500
Subject: [PATCH 23/50] fixing copyright header for BaseTest

---
 .../snippets/src/test/java/BaseTest.java      | 28 +++++++++----------
 1 file changed, 13 insertions(+), 15 deletions(-)

diff --git a/classroom/snippets/src/test/java/BaseTest.java b/classroom/snippets/src/test/java/BaseTest.java
index 4fd032f1..b0c5286e 100644
--- a/classroom/snippets/src/test/java/BaseTest.java
+++ b/classroom/snippets/src/test/java/BaseTest.java
@@ -1,18 +1,16 @@
-/*
- * Copyright 2022 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.http.javanet.NetHttpTransport;

From f69ff9f7b3a9f20c56aa4f98f6b39a9786092e89 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Mon, 23 Jan 2023 16:18:09 -0500
Subject: [PATCH 24/50] updated auth for AddAlias and CreateCourse classes

---
 .../src/main/java/AddAliasToCourse.java       | 29 ++++++++++---------
 .../snippets/src/main/java/CreateCourse.java  | 27 ++++++++---------
 .../src/test/java/TestAddAliasToCourse.java   |  2 +-
 .../src/test/java/TestAddStudent.java         |  2 +-
 .../src/test/java/TestCreateCourse.java       |  2 +-
 5 files changed, 32 insertions(+), 30 deletions(-)

diff --git a/classroom/snippets/src/main/java/AddAliasToCourse.java b/classroom/snippets/src/main/java/AddAliasToCourse.java
index 10434391..c0c4d530 100644
--- a/classroom/snippets/src/main/java/AddAliasToCourse.java
+++ b/classroom/snippets/src/main/java/AddAliasToCourse.java
@@ -15,6 +15,7 @@
 
 // [START classroom_add_alias_to_course_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
@@ -27,6 +28,7 @@
 import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
 import java.util.Collections;
+import java.util.List;
 
 /* Class to demonstrate the use of Classroom Create Alias API. */
 public class AddAliasToCourse {
@@ -37,21 +39,20 @@ public class AddAliasToCourse {
    * @return - newly created course alias.
    * @throws IOException - if credentials file not found.
    */
-  public static CourseAlias addAliasToCourse(String courseId) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-       TODO(developer) - See https://developers.google.com/identity for
-        guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSES));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static CourseAlias addAliasToCourse(String courseId) throws Exception {
+    /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+    final List<String> SCOPES = Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
 
-    // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    // Create the classroom API client
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_add_alias_to_course_code_snippet]
 
diff --git a/classroom/snippets/src/main/java/CreateCourse.java b/classroom/snippets/src/main/java/CreateCourse.java
index ce33dd4d..b3862bed 100644
--- a/classroom/snippets/src/main/java/CreateCourse.java
+++ b/classroom/snippets/src/main/java/CreateCourse.java
@@ -15,6 +15,7 @@
 
 // [START classroom_create_course]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.HttpRequestInitializer;
@@ -27,6 +28,7 @@
 import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
 import java.util.Collections;
+import java.util.List;
 
 /* Class to demonstrate the use of Classroom Create Course API */
 public class CreateCourse {
@@ -36,21 +38,20 @@ public class CreateCourse {
    * @return newly created course
    * @throws IOException - if credentials file not found.
    */
-  public static Course createCourse() throws IOException {
-        /* Load pre-authorized user credentials from the environment.
-           TODO(developer) - See https://developers.google.com/identity for
-            guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSES));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static Course createCourse() throws Exception {
+    /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+    final List<String> SCOPES = Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
 
     // Create the classroom API client
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     Course course = null;
     try {
diff --git a/classroom/snippets/src/test/java/TestAddAliasToCourse.java b/classroom/snippets/src/test/java/TestAddAliasToCourse.java
index c5b85777..4085c25f 100644
--- a/classroom/snippets/src/test/java/TestAddAliasToCourse.java
+++ b/classroom/snippets/src/test/java/TestAddAliasToCourse.java
@@ -22,7 +22,7 @@
 public class TestAddAliasToCourse extends BaseTest {
 
   @Test
-  public void testAddCourseAlias() throws IOException {
+  public void testAddCourseAlias() throws Exception {
     CourseAlias courseAlias = AddAliasToCourse.addAliasToCourse(testCourse.getId());
     List<CourseAlias> courseAliases = service.courses().aliases()
         .list(testCourse.getId()
diff --git a/classroom/snippets/src/test/java/TestAddStudent.java b/classroom/snippets/src/test/java/TestAddStudent.java
index f023989a..57fc2b45 100644
--- a/classroom/snippets/src/test/java/TestAddStudent.java
+++ b/classroom/snippets/src/test/java/TestAddStudent.java
@@ -22,7 +22,7 @@
 public class TestAddStudent extends BaseTest {
 
   @Test
-  public void testAddStudent() throws IOException {
+  public void testAddStudent() throws Exception {
     Course course = CreateCourse.createCourse();
     Student student = AddStudent.addStudent(course.getId(), course.getEnrollmentCode());
     deleteCourse(course.getId());
diff --git a/classroom/snippets/src/test/java/TestCreateCourse.java b/classroom/snippets/src/test/java/TestCreateCourse.java
index 381f2c2c..e09bd55f 100644
--- a/classroom/snippets/src/test/java/TestCreateCourse.java
+++ b/classroom/snippets/src/test/java/TestCreateCourse.java
@@ -21,7 +21,7 @@
 public class TestCreateCourse extends BaseTest {
 
   @Test
-  public void testCreateCourse() throws IOException {
+  public void testCreateCourse() throws Exception {
     Course course = CreateCourse.createCourse();
     Assert.assertNotNull("Course not returned.", course);
     deleteCourse(course.getId());

From ab81119b68e4d362015ae0bc8b9ef47370d4fad8 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Mon, 23 Jan 2023 16:30:57 -0500
Subject: [PATCH 25/50] removing unused imports

---
 classroom/snippets/src/main/java/AddAliasToCourse.java | 3 ---
 classroom/snippets/src/main/java/CreateCourse.java     | 3 ---
 2 files changed, 6 deletions(-)

diff --git a/classroom/snippets/src/main/java/AddAliasToCourse.java b/classroom/snippets/src/main/java/AddAliasToCourse.java
index c0c4d530..dd7fddec 100644
--- a/classroom/snippets/src/main/java/AddAliasToCourse.java
+++ b/classroom/snippets/src/main/java/AddAliasToCourse.java
@@ -18,14 +18,11 @@
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.CourseAlias;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.List;
diff --git a/classroom/snippets/src/main/java/CreateCourse.java b/classroom/snippets/src/main/java/CreateCourse.java
index b3862bed..d8fcd78b 100644
--- a/classroom/snippets/src/main/java/CreateCourse.java
+++ b/classroom/snippets/src/main/java/CreateCourse.java
@@ -18,14 +18,11 @@
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Course;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.List;

From 1cb5583bba3656097437cf0702b43626c7b37e49 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 24 Jan 2023 11:09:34 -0500
Subject: [PATCH 26/50] Fixing comment.

---
 classroom/snippets/src/main/java/AddAliasToCourse.java | 2 +-
 classroom/snippets/src/main/java/CreateCourse.java     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/classroom/snippets/src/main/java/AddAliasToCourse.java b/classroom/snippets/src/main/java/AddAliasToCourse.java
index dd7fddec..8d23709c 100644
--- a/classroom/snippets/src/main/java/AddAliasToCourse.java
+++ b/classroom/snippets/src/main/java/AddAliasToCourse.java
@@ -41,7 +41,7 @@ public static CourseAlias addAliasToCourse(String courseId) throws Exception {
     tokens/ folder. */
     final List<String> SCOPES = Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
 
-    // Create the classroom API client
+    // Create the classroom API client.
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
diff --git a/classroom/snippets/src/main/java/CreateCourse.java b/classroom/snippets/src/main/java/CreateCourse.java
index d8fcd78b..b08ba7a1 100644
--- a/classroom/snippets/src/main/java/CreateCourse.java
+++ b/classroom/snippets/src/main/java/CreateCourse.java
@@ -40,7 +40,7 @@ public static Course createCourse() throws Exception {
     tokens/ folder. */
     final List<String> SCOPES = Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
 
-    // Create the classroom API client
+    // Create the classroom API client.
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(

From ef20f9f5dc7e28bd63eae2d9e4a1c110cde4661d Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Wed, 25 Jan 2023 11:09:13 -0500
Subject: [PATCH 27/50] specifying errors in method signatures

---
 classroom/snippets/src/main/java/AddAliasToCourse.java     | 6 ++++--
 classroom/snippets/src/main/java/CreateCourse.java         | 5 +++--
 classroom/snippets/src/test/java/TestAddAliasToCourse.java | 3 ++-
 classroom/snippets/src/test/java/TestAddStudent.java       | 3 ++-
 classroom/snippets/src/test/java/TestCreateCourse.java     | 3 ++-
 5 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/classroom/snippets/src/main/java/AddAliasToCourse.java b/classroom/snippets/src/main/java/AddAliasToCourse.java
index 8d23709c..95832161 100644
--- a/classroom/snippets/src/main/java/AddAliasToCourse.java
+++ b/classroom/snippets/src/main/java/AddAliasToCourse.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_add_alias_to_course_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -24,11 +23,13 @@
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.CourseAlias;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.Collections;
 import java.util.List;
 
 /* Class to demonstrate the use of Classroom Create Alias API. */
 public class AddAliasToCourse {
+
   /**
    * Add an alias on an existing course.
    *
@@ -36,7 +37,8 @@ public class AddAliasToCourse {
    * @return - newly created course alias.
    * @throws IOException - if credentials file not found.
    */
-  public static CourseAlias addAliasToCourse(String courseId) throws Exception {
+  public static CourseAlias addAliasToCourse(String courseId)
+      throws GeneralSecurityException, IOException {
     /* Scopes required by this API call. If modifying these scopes, delete your previously saved
     tokens/ folder. */
     final List<String> SCOPES = Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
diff --git a/classroom/snippets/src/main/java/CreateCourse.java b/classroom/snippets/src/main/java/CreateCourse.java
index b08ba7a1..a7589c4b 100644
--- a/classroom/snippets/src/main/java/CreateCourse.java
+++ b/classroom/snippets/src/main/java/CreateCourse.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_create_course]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -24,18 +23,20 @@
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Course;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.Collections;
 import java.util.List;
 
 /* Class to demonstrate the use of Classroom Create Course API */
 public class CreateCourse {
+
   /**
    * Creates a course
    *
    * @return newly created course
    * @throws IOException - if credentials file not found.
    */
-  public static Course createCourse() throws Exception {
+  public static Course createCourse() throws GeneralSecurityException, IOException {
     /* Scopes required by this API call. If modifying these scopes, delete your previously saved
     tokens/ folder. */
     final List<String> SCOPES = Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
diff --git a/classroom/snippets/src/test/java/TestAddAliasToCourse.java b/classroom/snippets/src/test/java/TestAddAliasToCourse.java
index 4085c25f..ddae9187 100644
--- a/classroom/snippets/src/test/java/TestAddAliasToCourse.java
+++ b/classroom/snippets/src/test/java/TestAddAliasToCourse.java
@@ -14,6 +14,7 @@
 
 import com.google.api.services.classroom.model.CourseAlias;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.List;
 import org.junit.Assert;
 import org.junit.Test;
@@ -22,7 +23,7 @@
 public class TestAddAliasToCourse extends BaseTest {
 
   @Test
-  public void testAddCourseAlias() throws Exception {
+  public void testAddCourseAlias() throws GeneralSecurityException, IOException {
     CourseAlias courseAlias = AddAliasToCourse.addAliasToCourse(testCourse.getId());
     List<CourseAlias> courseAliases = service.courses().aliases()
         .list(testCourse.getId()
diff --git a/classroom/snippets/src/test/java/TestAddStudent.java b/classroom/snippets/src/test/java/TestAddStudent.java
index 57fc2b45..25bb5e39 100644
--- a/classroom/snippets/src/test/java/TestAddStudent.java
+++ b/classroom/snippets/src/test/java/TestAddStudent.java
@@ -14,6 +14,7 @@
 
 import com.google.api.services.classroom.model.Course;
 import com.google.api.services.classroom.model.Student;
+import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
 import java.io.IOException;
@@ -22,7 +23,7 @@
 public class TestAddStudent extends BaseTest {
 
   @Test
-  public void testAddStudent() throws Exception {
+  public void testAddStudent() throws GeneralSecurityException, IOException {
     Course course = CreateCourse.createCourse();
     Student student = AddStudent.addStudent(course.getId(), course.getEnrollmentCode());
     deleteCourse(course.getId());
diff --git a/classroom/snippets/src/test/java/TestCreateCourse.java b/classroom/snippets/src/test/java/TestCreateCourse.java
index e09bd55f..316b1355 100644
--- a/classroom/snippets/src/test/java/TestCreateCourse.java
+++ b/classroom/snippets/src/test/java/TestCreateCourse.java
@@ -13,6 +13,7 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.Course;
+import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
 import java.io.IOException;
@@ -21,7 +22,7 @@
 public class TestCreateCourse extends BaseTest {
 
   @Test
-  public void testCreateCourse() throws Exception {
+  public void testCreateCourse() throws GeneralSecurityException, IOException {
     Course course = CreateCourse.createCourse();
     Assert.assertNotNull("Course not returned.", course);
     deleteCourse(course.getId());

From 676cffaaefd8c12917fe8a33733c4ff0fc4a993f Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Wed, 25 Jan 2023 15:21:51 -0500
Subject: [PATCH 28/50] updated BaseTest and AddStudent

---
 .../src/main/java/AddAliasToCourse.java       | 10 +++---
 .../snippets/src/main/java/AddStudent.java    | 36 +++++++++----------
 .../snippets/src/main/java/CreateCourse.java  | 12 +++----
 .../snippets/src/test/java/BaseTest.java      | 15 ++++----
 .../src/test/java/TestAddAliasToCourse.java   |  2 ++
 .../src/test/java/TestAddStudent.java         | 10 +++---
 .../src/test/java/TestCreateCourse.java       |  2 ++
 7 files changed, 47 insertions(+), 40 deletions(-)

diff --git a/classroom/snippets/src/main/java/AddAliasToCourse.java b/classroom/snippets/src/main/java/AddAliasToCourse.java
index 95832161..4b6898c9 100644
--- a/classroom/snippets/src/main/java/AddAliasToCourse.java
+++ b/classroom/snippets/src/main/java/AddAliasToCourse.java
@@ -24,11 +24,14 @@
 import com.google.api.services.classroom.model.CourseAlias;
 import java.io.IOException;
 import java.security.GeneralSecurityException;
-import java.util.Collections;
-import java.util.List;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate the use of Classroom Create Alias API. */
 public class AddAliasToCourse {
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
 
   /**
    * Add an alias on an existing course.
@@ -39,9 +42,6 @@ public class AddAliasToCourse {
    */
   public static CourseAlias addAliasToCourse(String courseId)
       throws GeneralSecurityException, IOException {
-    /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-    tokens/ folder. */
-    final List<String> SCOPES = Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
 
     // Create the classroom API client.
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
diff --git a/classroom/snippets/src/main/java/AddStudent.java b/classroom/snippets/src/main/java/AddStudent.java
index c04c38fb..c8690c8c 100644
--- a/classroom/snippets/src/main/java/AddStudent.java
+++ b/classroom/snippets/src/main/java/AddStudent.java
@@ -15,21 +15,25 @@
 
 // [START classroom_add_student]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Student;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate the use of Classroom Add Student API */
 public class AddStudent {
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+      tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+
   /**
    * Add a student in a specified course.
    *
@@ -39,21 +43,17 @@ public class AddStudent {
    * @throws IOException - if credentials file not found.
    */
   public static Student addStudent(String courseId, String enrollmentCode)
-      throws IOException {
-        /* Load pre-authorized user credentials from the environment.
-           TODO(developer) - See https://developers.google.com/identity for
-            guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_ROSTERS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+      throws GeneralSecurityException, IOException {
 
-    // Create the classroom API client
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     Student student = new Student().setUserId("gduser1@workspacesamples.dev");
     try {
diff --git a/classroom/snippets/src/main/java/CreateCourse.java b/classroom/snippets/src/main/java/CreateCourse.java
index a7589c4b..44e267df 100644
--- a/classroom/snippets/src/main/java/CreateCourse.java
+++ b/classroom/snippets/src/main/java/CreateCourse.java
@@ -24,11 +24,14 @@
 import com.google.api.services.classroom.model.Course;
 import java.io.IOException;
 import java.security.GeneralSecurityException;
-import java.util.Collections;
-import java.util.List;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate the use of Classroom Create Course API */
 public class CreateCourse {
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+      tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
 
   /**
    * Creates a course
@@ -37,9 +40,6 @@ public class CreateCourse {
    * @throws IOException - if credentials file not found.
    */
   public static Course createCourse() throws GeneralSecurityException, IOException {
-    /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-    tokens/ folder. */
-    final List<String> SCOPES = Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
 
     // Create the classroom API client.
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
@@ -63,7 +63,7 @@ public static Course createCourse() throws GeneralSecurityException, IOException
               + "to be excited!")
           .setRoom("301")
           .setOwnerId("me")
-          .setCourseState("PROVISIONED");
+          .setCourseState("ACTIVE");
       course = service.courses().create(course).execute();
       // Prints the new created course Id and name
       System.out.printf("Course created: %s (%s)\n", course.getName(), course.getId());
diff --git a/classroom/snippets/src/test/java/BaseTest.java b/classroom/snippets/src/test/java/BaseTest.java
index b0c5286e..cdad6755 100644
--- a/classroom/snippets/src/test/java/BaseTest.java
+++ b/classroom/snippets/src/test/java/BaseTest.java
@@ -19,6 +19,8 @@
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Course;
 import com.google.api.services.classroom.model.CourseAlias;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import org.junit.After;
@@ -38,10 +40,10 @@ public class BaseTest {
    * @return an authorized Classroom client service
    * @throws IOException - if credentials file not found.
    */
-  protected Classroom buildService() throws Exception {
+  protected Classroom buildService(ArrayList<String> SCOPES) throws GeneralSecurityException, IOException {
     /* Scopes required by this API call. If modifying these scopes, delete your previously saved
     tokens/ folder. */
-    final List<String> SCOPES = Collections.singletonList(ClassroomScopes.CLASSROOM_COURSES);
+    SCOPES.add(ClassroomScopes.CLASSROOM_COURSES);
 
     // Create the classroom API client
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
@@ -54,16 +56,17 @@ protected Classroom buildService() throws Exception {
             .build();
   }
 
-  @Before
-  public void setup() throws Exception {
-    this.service = buildService();
+  public void setup(ArrayList<String> scopes) throws GeneralSecurityException, IOException {
+    this.service = buildService(scopes);
     this.testCourse = CreateCourse.createCourse();
     createAlias(this.testCourse.getId());
   }
 
   @After
   public void tearDown() throws IOException {
-    deleteCourse(this.testCourse.getId());
+    if (this.testCourse != null) {
+      deleteCourse(this.testCourse.getId());
+    }
     this.testCourse = null;
   }
 
diff --git a/classroom/snippets/src/test/java/TestAddAliasToCourse.java b/classroom/snippets/src/test/java/TestAddAliasToCourse.java
index ddae9187..8bbfb289 100644
--- a/classroom/snippets/src/test/java/TestAddAliasToCourse.java
+++ b/classroom/snippets/src/test/java/TestAddAliasToCourse.java
@@ -24,6 +24,8 @@ public class TestAddAliasToCourse extends BaseTest {
 
   @Test
   public void testAddCourseAlias() throws GeneralSecurityException, IOException {
+  // Include the scopes required to run the code example for testing purposes.
+    setup(AddAliasToCourse.SCOPES);
     CourseAlias courseAlias = AddAliasToCourse.addAliasToCourse(testCourse.getId());
     List<CourseAlias> courseAliases = service.courses().aliases()
         .list(testCourse.getId()
diff --git a/classroom/snippets/src/test/java/TestAddStudent.java b/classroom/snippets/src/test/java/TestAddStudent.java
index 25bb5e39..77485e52 100644
--- a/classroom/snippets/src/test/java/TestAddStudent.java
+++ b/classroom/snippets/src/test/java/TestAddStudent.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import com.google.api.services.classroom.model.Course;
 import com.google.api.services.classroom.model.Student;
 import java.security.GeneralSecurityException;
 import org.junit.Assert;
@@ -24,11 +23,12 @@ public class TestAddStudent extends BaseTest {
 
   @Test
   public void testAddStudent() throws GeneralSecurityException, IOException {
-    Course course = CreateCourse.createCourse();
-    Student student = AddStudent.addStudent(course.getId(), course.getEnrollmentCode());
-    deleteCourse(course.getId());
+    // Include the scopes required to run the code example for testing purposes.
+    setup(AddStudent.SCOPES);
+    Student student = AddStudent.addStudent(testCourse.getId(), testCourse.getEnrollmentCode());
     Assert.assertNotNull("Student not returned.", student);
-    Assert.assertEquals("Student added to wrong course.", course.getId(),
+    Assert.assertNotNull("Course not returned.", student.getCourseId());
+    Assert.assertEquals("Student added to wrong course.", testCourse.getId(),
         student.getCourseId());
   }
 }
\ No newline at end of file
diff --git a/classroom/snippets/src/test/java/TestCreateCourse.java b/classroom/snippets/src/test/java/TestCreateCourse.java
index 316b1355..86200500 100644
--- a/classroom/snippets/src/test/java/TestCreateCourse.java
+++ b/classroom/snippets/src/test/java/TestCreateCourse.java
@@ -23,6 +23,8 @@ public class TestCreateCourse extends BaseTest {
 
   @Test
   public void testCreateCourse() throws GeneralSecurityException, IOException {
+  // Include the scopes required to run the code example for testing purposes.
+    setup(CreateCourse.SCOPES);
     Course course = CreateCourse.createCourse();
     Assert.assertNotNull("Course not returned.", course);
     deleteCourse(course.getId());

From 130240f186864447d9bdbc04ef1f81f9e2609ecd Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Wed, 25 Jan 2023 15:34:32 -0500
Subject: [PATCH 29/50] Adding annotation for GeneralSecurityException

---
 classroom/snippets/src/main/java/AddAliasToCourse.java | 1 +
 classroom/snippets/src/main/java/AddStudent.java       | 3 ++-
 classroom/snippets/src/main/java/CreateCourse.java     | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/classroom/snippets/src/main/java/AddAliasToCourse.java b/classroom/snippets/src/main/java/AddAliasToCourse.java
index 4b6898c9..8187e44f 100644
--- a/classroom/snippets/src/main/java/AddAliasToCourse.java
+++ b/classroom/snippets/src/main/java/AddAliasToCourse.java
@@ -39,6 +39,7 @@ public class AddAliasToCourse {
    * @param courseId - id of the course to add an alias to.
    * @return - newly created course alias.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
   public static CourseAlias addAliasToCourse(String courseId)
       throws GeneralSecurityException, IOException {
diff --git a/classroom/snippets/src/main/java/AddStudent.java b/classroom/snippets/src/main/java/AddStudent.java
index c8690c8c..06bd7d36 100644
--- a/classroom/snippets/src/main/java/AddStudent.java
+++ b/classroom/snippets/src/main/java/AddStudent.java
@@ -37,10 +37,11 @@ public class AddStudent {
   /**
    * Add a student in a specified course.
    *
-   * @param courseId       - Id of the course.
+   * @param courseId - Id of the course.
    * @param enrollmentCode - Code of the course to enroll.
    * @return newly added student
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
   public static Student addStudent(String courseId, String enrollmentCode)
       throws GeneralSecurityException, IOException {
diff --git a/classroom/snippets/src/main/java/CreateCourse.java b/classroom/snippets/src/main/java/CreateCourse.java
index 44e267df..b54de6a0 100644
--- a/classroom/snippets/src/main/java/CreateCourse.java
+++ b/classroom/snippets/src/main/java/CreateCourse.java
@@ -38,6 +38,7 @@ public class CreateCourse {
    *
    * @return newly created course
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
   public static Course createCourse() throws GeneralSecurityException, IOException {
 

From b2cbc21f93beba97e8079b693717681448b9eb45 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Thu, 26 Jan 2023 14:39:03 -0500
Subject: [PATCH 30/50] updating AddStudent method signature and test

---
 classroom/snippets/src/main/java/AddStudent.java     | 9 +++++----
 classroom/snippets/src/test/java/TestAddStudent.java | 5 ++++-
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/classroom/snippets/src/main/java/AddStudent.java b/classroom/snippets/src/main/java/AddStudent.java
index 06bd7d36..e87ac1ff 100644
--- a/classroom/snippets/src/main/java/AddStudent.java
+++ b/classroom/snippets/src/main/java/AddStudent.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_add_student]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -30,9 +29,11 @@
 
 /* Class to demonstrate the use of Classroom Add Student API */
 public class AddStudent {
+
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
       tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
 
   /**
    * Add a student in a specified course.
@@ -43,7 +44,7 @@ public class AddStudent {
    * @throws IOException - if credentials file not found.
    * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static Student addStudent(String courseId, String enrollmentCode)
+  public static Student addStudent(String courseId, String enrollmentCode, String studentId)
       throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
@@ -56,7 +57,7 @@ public static Student addStudent(String courseId, String enrollmentCode)
             .setApplicationName("Classroom samples")
             .build();
 
-    Student student = new Student().setUserId("gduser1@workspacesamples.dev");
+    Student student = new Student().setUserId(studentId);
     try {
       // Enrolling a student to a specified course
       student = service.courses().students().create(courseId, student)
diff --git a/classroom/snippets/src/test/java/TestAddStudent.java b/classroom/snippets/src/test/java/TestAddStudent.java
index 77485e52..51d9d22a 100644
--- a/classroom/snippets/src/test/java/TestAddStudent.java
+++ b/classroom/snippets/src/test/java/TestAddStudent.java
@@ -21,11 +21,14 @@
 // Unit test class for Add Student classroom snippet
 public class TestAddStudent extends BaseTest {
 
+  private String studentId = "insert_student_id";
+
   @Test
   public void testAddStudent() throws GeneralSecurityException, IOException {
     // Include the scopes required to run the code example for testing purposes.
     setup(AddStudent.SCOPES);
-    Student student = AddStudent.addStudent(testCourse.getId(), testCourse.getEnrollmentCode());
+    Student student = AddStudent.addStudent(testCourse.getId(), testCourse.getEnrollmentCode(),
+        studentId);
     Assert.assertNotNull("Student not returned.", student);
     Assert.assertNotNull("Course not returned.", student.getCourseId());
     Assert.assertEquals("Student added to wrong course.", testCourse.getId(),

From c32006ac1ac0eec2588fe0d756ce09e34dd0d8b5 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Thu, 26 Jan 2023 14:53:57 -0500
Subject: [PATCH 31/50] updated AddTeacher and AddStudent test

---
 .../snippets/src/main/java/AddTeacher.java    | 42 ++++++++++---------
 .../src/test/java/TestAddStudent.java         |  2 +-
 .../src/test/java/TestAddTeacher.java         | 10 +++--
 3 files changed, 30 insertions(+), 24 deletions(-)

diff --git a/classroom/snippets/src/main/java/AddTeacher.java b/classroom/snippets/src/main/java/AddTeacher.java
index 9f5652e3..7f07a661 100644
--- a/classroom/snippets/src/main/java/AddTeacher.java
+++ b/classroom/snippets/src/main/java/AddTeacher.java
@@ -12,48 +12,50 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_add_teacher]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Teacher;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate the use of Classroom Add Teacher API */
 public class AddTeacher {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+
   /**
    * Add teacher to a specific course.
    *
-   * @param courseId     - Id of the course.
+   * @param courseId - Id of the course.
    * @param teacherEmail - Email address of the teacher.
    * @return newly created teacher
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
   public static Teacher addTeacher(String courseId, String teacherEmail)
-      throws IOException {
-        /* Load pre-authorized user credentials from the environment.
-           TODO(developer) - See https://developers.google.com/identity for
-            guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_ROSTERS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+      throws GeneralSecurityException, IOException {
 
-    // Create the classroom API client
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     Teacher teacher = new Teacher().setUserId(teacherEmail);
     try {
diff --git a/classroom/snippets/src/test/java/TestAddStudent.java b/classroom/snippets/src/test/java/TestAddStudent.java
index 51d9d22a..c1cc6e6f 100644
--- a/classroom/snippets/src/test/java/TestAddStudent.java
+++ b/classroom/snippets/src/test/java/TestAddStudent.java
@@ -28,7 +28,7 @@ public void testAddStudent() throws GeneralSecurityException, IOException {
     // Include the scopes required to run the code example for testing purposes.
     setup(AddStudent.SCOPES);
     Student student = AddStudent.addStudent(testCourse.getId(), testCourse.getEnrollmentCode(),
-        studentId);
+        this.studentId);
     Assert.assertNotNull("Student not returned.", student);
     Assert.assertNotNull("Course not returned.", student.getCourseId());
     Assert.assertEquals("Student added to wrong course.", testCourse.getId(),
diff --git a/classroom/snippets/src/test/java/TestAddTeacher.java b/classroom/snippets/src/test/java/TestAddTeacher.java
index f2846ddf..efa1cafc 100644
--- a/classroom/snippets/src/test/java/TestAddTeacher.java
+++ b/classroom/snippets/src/test/java/TestAddTeacher.java
@@ -13,17 +13,21 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.Teacher;
+import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
 import java.io.IOException;
 
 // Unit test class for Add Teacher classroom snippet
 public class TestAddTeacher extends BaseTest {
-  private String otherUser = "gduser1@workspacesamples.dev";
+
+  private String teacherEmail = "insert_teacher_email";
 
   @Test
-  public void testAddTeacher() throws IOException {
-    Teacher teacher = AddTeacher.addTeacher(testCourse.getId(), this.otherUser);
+  public void testAddTeacher() throws GeneralSecurityException, IOException {
+    // Include the scopes required to run the code example for testing purposes.
+    setup(AddTeacher.SCOPES);
+    Teacher teacher = AddTeacher.addTeacher(testCourse.getId(), this.teacherEmail);
     Assert.assertNotNull("Teacher not returned.", teacher);
     Assert.assertEquals("Teacher added to wrong course.", testCourse.getId(),
         teacher.getCourseId());

From a55e9ec493026ae72254d6265d81058a63545560 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Thu, 26 Jan 2023 15:06:40 -0500
Subject: [PATCH 32/50] updated auth for BatchAddStudents

---
 .../src/main/java/BatchAddStudents.java       | 39 ++++++++++---------
 .../src/test/java/TestBatchAddStudents.java   |  8 ++--
 2 files changed, 26 insertions(+), 21 deletions(-)

diff --git a/classroom/snippets/src/main/java/BatchAddStudents.java b/classroom/snippets/src/main/java/BatchAddStudents.java
index 9588ec3d..9e2cf6e0 100644
--- a/classroom/snippets/src/main/java/BatchAddStudents.java
+++ b/classroom/snippets/src/main/java/BatchAddStudents.java
@@ -17,45 +17,48 @@
 
 import com.google.api.client.googleapis.batch.BatchRequest;
 import com.google.api.client.googleapis.batch.json.JsonBatchCallback;
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.http.HttpHeaders;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Student;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 /* Class to demonstrate the use of Classroom Batch Add Students API */
 public class BatchAddStudents {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+
   /**
    * Add multiple students in a specified course.
    *
    * @param courseId      - Id of the course to add students.
    * @param studentEmails - Email address of the students.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
   public static void batchAddStudents(String courseId, List<String> studentEmails)
-      throws IOException {
-        /* Load pre-authorized user credentials from the environment.
-           TODO(developer) - See https://developers.google.com/identity for
-            guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_ROSTERS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+      throws GeneralSecurityException, IOException {
 
-    // Create the classroom API client
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     BatchRequest batch = service.batch();
     JsonBatchCallback<Student> callback = new JsonBatchCallback<>() {
diff --git a/classroom/snippets/src/test/java/TestBatchAddStudents.java b/classroom/snippets/src/test/java/TestBatchAddStudents.java
index 04ee930e..cfa1f4c7 100644
--- a/classroom/snippets/src/test/java/TestBatchAddStudents.java
+++ b/classroom/snippets/src/test/java/TestBatchAddStudents.java
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import java.security.GeneralSecurityException;
 import org.junit.Test;
 import java.io.IOException;
 import java.util.Arrays;
@@ -21,9 +22,10 @@
 public class TestBatchAddStudents extends BaseTest {
 
   @Test
-  public void testBatchAddStudents() throws IOException {
-    List<String> studentEmails = Arrays.asList("gduser2@workpsacesamples.dev",
-        "gduser3@workpsacesamples.dev");
+  public void testBatchAddStudents() throws GeneralSecurityException, IOException {
+    setup(BatchAddStudents.SCOPES);
+    List<String> studentEmails = Arrays.asList("insert_student_1_email",
+        "insert_student_2_email");
     BatchAddStudents.batchAddStudents(testCourse.getId(), studentEmails);
   }
 }
\ No newline at end of file

From 86b7655bf53568766d2f96473148368d594c5ccd Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Thu, 26 Jan 2023 15:28:05 -0500
Subject: [PATCH 33/50] updated auth for CreateCourseWork

---
 .../src/main/java/CreateCourseWork.java       | 39 ++++++++++---------
 .../src/test/java/TestCreateCourseWork.java   |  5 ++-
 2 files changed, 24 insertions(+), 20 deletions(-)

diff --git a/classroom/snippets/src/main/java/CreateCourseWork.java b/classroom/snippets/src/main/java/CreateCourseWork.java
index 7f9973ca..32afb896 100644
--- a/classroom/snippets/src/main/java/CreateCourseWork.java
+++ b/classroom/snippets/src/main/java/CreateCourseWork.java
@@ -14,49 +14,50 @@
 
 
 // [START classroom_create_coursework_class]
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.CourseWork;
-import com.google.api.services.classroom.model.Date;
 import com.google.api.services.classroom.model.Link;
 import com.google.api.services.classroom.model.Material;
-import com.google.api.services.classroom.model.TimeOfDay;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 
 /* Class to demonstrate the use of Classroom Create CourseWork API. */
 public class CreateCourseWork {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+
   /**
    * Creates course work.
    *
    * @param courseId - id of the course to create coursework in.
    * @return - newly created CourseWork object.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static CourseWork createCourseWork(String courseId) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-       TODO(developer) - See https://developers.google.com/identity for
-        guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static CourseWork createCourseWork(String courseId)
+      throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_create_coursework_code_snippet]
 
diff --git a/classroom/snippets/src/test/java/TestCreateCourseWork.java b/classroom/snippets/src/test/java/TestCreateCourseWork.java
index e3a25b6b..5a160af0 100644
--- a/classroom/snippets/src/test/java/TestCreateCourseWork.java
+++ b/classroom/snippets/src/test/java/TestCreateCourseWork.java
@@ -14,6 +14,7 @@
 
 import com.google.api.services.classroom.model.CourseWork;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -21,7 +22,9 @@
 public class TestCreateCourseWork extends BaseTest {
 
   @Test
-  public void testCreateCoursework() throws IOException {
+  public void testCreateCoursework() throws GeneralSecurityException, IOException {
+    // Include the scopes required to run the code example for testing purposes.
+    setup(CreateCourseWork.SCOPES);
     CourseWork courseWork = CreateCourseWork.createCourseWork(testCourse.getId());
     Assert.assertNotNull("Coursework not returned.", courseWork);
   }

From 4c3b0e13b26c190b03942fe22790303266abc53a Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Thu, 26 Jan 2023 15:57:43 -0500
Subject: [PATCH 34/50] updated auth for Topic related classes and tests

---
 .../snippets/src/main/java/CreateTopic.java   | 38 +++++++--------
 .../snippets/src/main/java/DeleteTopic.java   | 46 +++++++++----------
 .../snippets/src/main/java/GetTopic.java      | 46 +++++++++----------
 .../snippets/src/main/java/ListTopics.java    | 29 ++++++------
 .../snippets/src/main/java/UpdateTopic.java   | 40 ++++++++--------
 .../src/test/java/TestCreateTopic.java        |  4 +-
 .../src/test/java/TestDeleteTopic.java        |  5 +-
 .../snippets/src/test/java/TestGetTopic.java  |  4 +-
 .../src/test/java/TestListTopics.java         |  4 +-
 .../src/test/java/TestUpdateTopic.java        |  6 ++-
 10 files changed, 119 insertions(+), 103 deletions(-)

diff --git a/classroom/snippets/src/main/java/CreateTopic.java b/classroom/snippets/src/main/java/CreateTopic.java
index a46e573f..f09aa875 100644
--- a/classroom/snippets/src/main/java/CreateTopic.java
+++ b/classroom/snippets/src/main/java/CreateTopic.java
@@ -12,46 +12,48 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_create_topic_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Topic;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate how to create a topic. */
 public class CreateTopic {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
+
   /**
    * Create a new topic in a course.
    *
    * @param courseId - the id of the course to create a topic in.
    * @return - newly created topic.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static Topic createTopic(String courseId) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-       TODO(developer) - See https://developers.google.com/identity for
-        guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static Topic createTopic(String courseId) throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_create_topic_code_snippet]
 
diff --git a/classroom/snippets/src/main/java/DeleteTopic.java b/classroom/snippets/src/main/java/DeleteTopic.java
index b8ee8f73..b94ce294 100644
--- a/classroom/snippets/src/main/java/DeleteTopic.java
+++ b/classroom/snippets/src/main/java/DeleteTopic.java
@@ -12,23 +12,28 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_delete_topic_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate how to delete a topic. */
 public class DeleteTopic {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
+
   /**
    * Delete a topic in a course.
    *
@@ -36,22 +41,20 @@ public class DeleteTopic {
    * @param topicId - the id of the topic to delete.
    * @return - updated topic.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static void deleteTopic(String courseId, String topicId) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static void deleteTopic(String courseId, String topicId)
+      throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_delete_topic_code_snippet]
 
@@ -59,12 +62,7 @@ public static void deleteTopic(String courseId, String topicId) throws IOExcepti
       service.courses().topics().delete(courseId, topicId).execute();
     } catch (GoogleJsonResponseException e) {
       // TODO(developer) - handle error appropriately
-      GoogleJsonError error = e.getDetails();
-      if (error.getCode() == 404) {
-        System.out.printf("The courseId or topicId does not exist: %s, %s.\n", courseId, topicId);
-      } else {
-        throw e;
-      }
+      throw e;
     } catch (Exception e) {
       throw e;
     }
diff --git a/classroom/snippets/src/main/java/GetTopic.java b/classroom/snippets/src/main/java/GetTopic.java
index 140a0407..3570636e 100644
--- a/classroom/snippets/src/main/java/GetTopic.java
+++ b/classroom/snippets/src/main/java/GetTopic.java
@@ -12,24 +12,29 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_get_topic_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Topic;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate how to get a topic. */
 public class GetTopic {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
+
   /**
    * Get a topic in a course.
    *
@@ -37,22 +42,20 @@ public class GetTopic {
    * @param topicId - the id of the topic to retrieve.
    * @return - the topic to retrieve.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static Topic getTopic(String courseId, String topicId) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static Topic getTopic(String courseId, String topicId)
+      throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_get_topic_code_snippet]
 
@@ -63,12 +66,7 @@ public static Topic getTopic(String courseId, String topicId) throws IOException
       System.out.printf("Topic '%s' found.\n", topic.getName());
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
-      GoogleJsonError error = e.getDetails();
-      if (error.getCode() == 404) {
-        System.out.printf("The courseId or topicId does not exist: %s, %s.\n", courseId, topicId);
-      } else {
-        throw e;
-      }
+      throw e;
     } catch (Exception e) {
       throw e;
     }
diff --git a/classroom/snippets/src/main/java/ListTopics.java b/classroom/snippets/src/main/java/ListTopics.java
index 6412a1cb..f2e2dd0c 100644
--- a/classroom/snippets/src/main/java/ListTopics.java
+++ b/classroom/snippets/src/main/java/ListTopics.java
@@ -14,44 +14,47 @@
 
 // [START classroom_list_topic_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.ListTopicResponse;
 import com.google.api.services.classroom.model.Topic;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.ArrayList;
-import java.util.Collections;
+import java.util.Arrays;
 import java.util.List;
 
 /* Class to demonstrate how to list topics in a course. */
 public class ListTopics {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
+
   /**
    * List topics in a course.
    *
    * @param courseId - the id of the course to retrieve topics for.
    * @return - the list of topics in the course that the caller is permitted to view.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static List<Topic> listTopics(String courseId) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-    TODO(developer) - See https://developers.google.com/identity for
-     guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials =
-        GoogleCredentials.getApplicationDefault()
-            .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(credentials);
+  public static List<Topic> listTopics(String courseId)
+      throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-                new NetHttpTransport(), GsonFactory.getDefaultInstance(), requestInitializer)
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
diff --git a/classroom/snippets/src/main/java/UpdateTopic.java b/classroom/snippets/src/main/java/UpdateTopic.java
index f45ffeca..62546e22 100644
--- a/classroom/snippets/src/main/java/UpdateTopic.java
+++ b/classroom/snippets/src/main/java/UpdateTopic.java
@@ -12,24 +12,29 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_update_topic_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Topic;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate how to update one or more fields in a topic. */
 public class UpdateTopic {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
+
   /**
    * Update one or more fields in a topic in a course.
    *
@@ -37,22 +42,19 @@ public class UpdateTopic {
    * @param topicId - the id of the topic to update.
    * @return - updated topic.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static Topic updateTopic(String courseId, String topicId) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_TOPICS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
-
+  public static Topic updateTopic(String courseId, String topicId)
+      throws GeneralSecurityException, IOException {
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_update_topic_code_snippet]
 
diff --git a/classroom/snippets/src/test/java/TestCreateTopic.java b/classroom/snippets/src/test/java/TestCreateTopic.java
index e2d77586..381921d9 100644
--- a/classroom/snippets/src/test/java/TestCreateTopic.java
+++ b/classroom/snippets/src/test/java/TestCreateTopic.java
@@ -14,6 +14,7 @@
 
 import com.google.api.services.classroom.model.Topic;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -21,7 +22,8 @@
 public class TestCreateTopic extends BaseTest {
 
   @Test
-  public void testCreateTopic() throws IOException {
+  public void testCreateTopic() throws GeneralSecurityException, IOException {
+    setup(CreateTopic.SCOPES);
     Topic topic = CreateTopic.createTopic(testCourse.getId());
     Assert.assertNotNull("Topic not returned.", topic);
   }
diff --git a/classroom/snippets/src/test/java/TestDeleteTopic.java b/classroom/snippets/src/test/java/TestDeleteTopic.java
index b093865c..a77a2b91 100644
--- a/classroom/snippets/src/test/java/TestDeleteTopic.java
+++ b/classroom/snippets/src/test/java/TestDeleteTopic.java
@@ -15,12 +15,15 @@
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.services.classroom.model.Topic;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
 
 public class TestDeleteTopic extends BaseTest {
+
   @Test
-  public void testDeleteTopic() throws IOException {
+  public void testDeleteTopic() throws GeneralSecurityException, IOException {
+    setup(DeleteTopic.SCOPES);
     Topic topic = CreateTopic.createTopic(testCourse.getId());
     DeleteTopic.deleteTopic(testCourse.getId(), topic.getTopicId());
     Assert.assertThrows(GoogleJsonResponseException.class,
diff --git a/classroom/snippets/src/test/java/TestGetTopic.java b/classroom/snippets/src/test/java/TestGetTopic.java
index b7cb7840..39775ff2 100644
--- a/classroom/snippets/src/test/java/TestGetTopic.java
+++ b/classroom/snippets/src/test/java/TestGetTopic.java
@@ -14,6 +14,7 @@
 
 import com.google.api.services.classroom.model.Topic;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -21,7 +22,8 @@
 public class TestGetTopic extends BaseTest {
 
   @Test
-  public void testGetTopic() throws IOException {
+  public void testGetTopic() throws GeneralSecurityException, IOException {
+    setup(GetTopic.SCOPES);
     Topic topic = CreateTopic.createTopic(testCourse.getId());
     Topic getTopic = GetTopic.getTopic(testCourse.getId(), topic.getTopicId());
     Assert.assertNotNull("Topic could not be created.", topic);
diff --git a/classroom/snippets/src/test/java/TestListTopics.java b/classroom/snippets/src/test/java/TestListTopics.java
index 081be57b..f0b0bc85 100644
--- a/classroom/snippets/src/test/java/TestListTopics.java
+++ b/classroom/snippets/src/test/java/TestListTopics.java
@@ -14,6 +14,7 @@
 
 import com.google.api.services.classroom.model.Topic;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.List;
 import org.junit.Assert;
 import org.junit.Test;
@@ -22,7 +23,8 @@
 public class TestListTopics extends BaseTest {
 
   @Test
-  public void testListTopics() throws IOException {
+  public void testListTopics() throws GeneralSecurityException, IOException {
+    setup(ListTopics.SCOPES);
     CreateTopic.createTopic(testCourse.getId());
     List<Topic> listTopics = ListTopics.listTopics(testCourse.getId());
     Assert.assertNotNull("Topics could not be retrieved.", listTopics);
diff --git a/classroom/snippets/src/test/java/TestUpdateTopic.java b/classroom/snippets/src/test/java/TestUpdateTopic.java
index 5b1b9eec..3144ff2d 100644
--- a/classroom/snippets/src/test/java/TestUpdateTopic.java
+++ b/classroom/snippets/src/test/java/TestUpdateTopic.java
@@ -11,15 +11,19 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
+
 import com.google.api.services.classroom.model.Topic;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
 
 // Unit test class for Update Topic classroom snippet
 public class TestUpdateTopic extends BaseTest {
+
   @Test
-  public void testUpdateTopic() throws IOException {
+  public void testUpdateTopic() throws GeneralSecurityException, IOException {
+    setup(UpdateTopic.SCOPES);
     Topic topic = CreateTopic.createTopic(testCourse.getId());
     System.out.println("New topic created: " + topic.getName());
     Topic updatedTopic = UpdateTopic.updateTopic(testCourse.getId(), topic.getTopicId());

From 4c92d15ca7506c5b7a61a6ebacab35979590cc5a Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Mon, 6 Feb 2023 12:24:15 -0500
Subject: [PATCH 35/50] added link to CourseState info and updated GetTopic
 error handling

---
 classroom/snippets/src/main/java/CreateCourse.java | 3 ++-
 classroom/snippets/src/main/java/GetTopic.java     | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/classroom/snippets/src/main/java/CreateCourse.java b/classroom/snippets/src/main/java/CreateCourse.java
index b54de6a0..73f49e1f 100644
--- a/classroom/snippets/src/main/java/CreateCourse.java
+++ b/classroom/snippets/src/main/java/CreateCourse.java
@@ -54,7 +54,8 @@ public static Course createCourse() throws GeneralSecurityException, IOException
 
     Course course = null;
     try {
-      // Adding a new course with description
+      // Adding a new course with description. Set CourseState to `ACTIVE`. Possible values of
+      // CourseState can be found here: https://developers.google.com/classroom/reference/rest/v1/courses#coursestate
       course = new Course()
           .setName("10th Grade Biology")
           .setSection("Period 2")
diff --git a/classroom/snippets/src/main/java/GetTopic.java b/classroom/snippets/src/main/java/GetTopic.java
index 3570636e..facf7ea5 100644
--- a/classroom/snippets/src/main/java/GetTopic.java
+++ b/classroom/snippets/src/main/java/GetTopic.java
@@ -66,6 +66,10 @@ public static Topic getTopic(String courseId, String topicId)
       System.out.printf("Topic '%s' found.\n", topic.getName());
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId or topicId does not exist: %s, %s.\n", courseId, topicId);
+      }
       throw e;
     } catch (Exception e) {
       throw e;

From 4342b9f1d0c05723264b6372b6734e8c0cc8963e Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 7 Feb 2023 12:33:19 -0500
Subject: [PATCH 36/50] updated auth for remaining classes

---
 .../snippets/src/main/java/GetCourse.java     | 38 +++++++++---------
 .../src/main/java/ListCourseAliases.java      | 37 +++++++++---------
 .../snippets/src/main/java/ListCourses.java   | 38 +++++++++---------
 .../src/main/java/ListStudentSubmissions.java | 29 +++++++-------
 .../src/main/java/ListSubmissions.java        | 26 ++++++-------
 .../ModifyAttachmentsStudentSubmission.java   | 37 ++++++++++--------
 .../snippets/src/main/java/PatchCourse.java   | 39 ++++++++++---------
 .../src/main/java/PatchStudentSubmission.java | 36 +++++++++--------
 .../main/java/ReturnStudentSubmission.java    | 36 +++++++++--------
 .../snippets/src/main/java/UpdateCourse.java  | 38 +++++++++---------
 .../snippets/src/test/java/TestGetCourse.java |  6 ++-
 .../src/test/java/TestListCourseAliases.java  |  8 ++--
 .../src/test/java/TestListCourses.java        |  7 ++--
 .../src/test/java/TestListSubmissions.java    |  4 +-
 .../src/test/java/TestPatchCourse.java        |  6 ++-
 .../src/test/java/TestUpdateCourse.java       |  6 ++-
 16 files changed, 209 insertions(+), 182 deletions(-)

diff --git a/classroom/snippets/src/main/java/GetCourse.java b/classroom/snippets/src/main/java/GetCourse.java
index 7955f1da..1efea231 100644
--- a/classroom/snippets/src/main/java/GetCourse.java
+++ b/classroom/snippets/src/main/java/GetCourse.java
@@ -15,43 +15,45 @@
 
 // [START classroom_get_course]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Course;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate the use of Classroom Get Course API */
 public class GetCourse {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+
   /**
    * Retrieve a single course's metadata.
    *
    * @param courseId - Id of the course to return.
    * @return a course
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static Course getCourse(String courseId) throws IOException {
-        /* Load pre-authorized user credentials from the environment.
-           TODO(developer) - See https://developers.google.com/identity for
-            guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSES));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static Course getCourse(String courseId) throws GeneralSecurityException, IOException {
 
-    // Create the classroom API client
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     Course course = null;
     try {
diff --git a/classroom/snippets/src/main/java/ListCourseAliases.java b/classroom/snippets/src/main/java/ListCourseAliases.java
index c3141cf1..3a6a93cc 100644
--- a/classroom/snippets/src/main/java/ListCourseAliases.java
+++ b/classroom/snippets/src/main/java/ListCourseAliases.java
@@ -15,47 +15,48 @@
 
 // [START classroom_list_aliases_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.CourseAlias;
 import com.google.api.services.classroom.model.ListCourseAliasesResponse;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.ArrayList;
-import java.util.Collections;
+import java.util.Arrays;
 import java.util.List;
 
 /* Class to demonstrate the use of Classroom List Alias API */
 public class ListCourseAliases {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+
   /**
    * Retrieve the aliases for a course.
    *
    * @param courseId - id of the course.
    * @return list of course aliases
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
   public static List<CourseAlias> listCourseAliases(String courseId)
-      throws IOException {
-        /* Load pre-authorized user credentials from the environment.
-           TODO(developer) - See https://developers.google.com/identity for
-            guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSES));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+      throws GeneralSecurityException, IOException {
 
-    // Create the classroom API client
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_list_aliases_code_snippet]
 
diff --git a/classroom/snippets/src/main/java/ListCourses.java b/classroom/snippets/src/main/java/ListCourses.java
index 5b7bd58f..3ba78a13 100644
--- a/classroom/snippets/src/main/java/ListCourses.java
+++ b/classroom/snippets/src/main/java/ListCourses.java
@@ -15,44 +15,44 @@
 
 // [START classroom_list_courses]
 
-import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Course;
 import com.google.api.services.classroom.model.ListCoursesResponse;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
-
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.ArrayList;
-import java.util.Collections;
+import java.util.Arrays;
 import java.util.List;
 
 /* Class to demonstrate the use of Classroom List Course API */
 public class ListCourses {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+
   /**
    * Retrieves all courses with metadata
    *
    * @return list of courses with its metadata
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static List<Course> listCourses() throws IOException {
-        /* Load pre-authorized user credentials from the environment.
-           TODO(developer) - See https://developers.google.com/identity for
-            guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSES));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static List<Course> listCourses() throws GeneralSecurityException, IOException {
 
-    // Create the classroom API client
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     String pageToken = null;
     List<Course> courses = new ArrayList<>();
diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index c5d8b29f..a0d6dc9e 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -14,24 +14,28 @@
 
 // [START classroom_list_student_submissions_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.ListStudentSubmissionsResponse;
 import com.google.api.services.classroom.model.StudentSubmission;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.ArrayList;
-import java.util.Collections;
+import java.util.Arrays;
 import java.util.List;
 
 /* Class to demonstrate the use of Classroom List StudentSubmissions API. */
 public class ListStudentSubmissions {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+
   /**
    * Retrieves a specific student's submissions for the specified course work.
    *
@@ -40,21 +44,18 @@ public class ListStudentSubmissions {
    * @param userId - identifier of the student whose work to return.
    * @return - list of student submissions.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static List<StudentSubmission> listStudentSubmissions(
-      String courseId, String courseWorkId, String userId) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-    TODO(developer) - See https://developers.google.com/identity for
-     guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials =
-        GoogleCredentials.getApplicationDefault()
-            .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(credentials);
+  public static List<StudentSubmission> listStudentSubmissions(String courseId, String courseWorkId, String userId)
+      throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-                new NetHttpTransport(), GsonFactory.getDefaultInstance(), requestInitializer)
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
diff --git a/classroom/snippets/src/main/java/ListSubmissions.java b/classroom/snippets/src/main/java/ListSubmissions.java
index d5356d70..84bf5fa6 100644
--- a/classroom/snippets/src/main/java/ListSubmissions.java
+++ b/classroom/snippets/src/main/java/ListSubmissions.java
@@ -14,24 +14,27 @@
 
 // [START classroom_list_submissions_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.ListStudentSubmissionsResponse;
 import com.google.api.services.classroom.model.StudentSubmission;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.ArrayList;
-import java.util.Collections;
+import java.util.Arrays;
 import java.util.List;
 
 /* Class to demonstrate the use of Classroom List StudentSubmissions API. */
 public class ListSubmissions {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
   /**
    * Retrieves submissions for all students for the specified course work in a course.
    *
@@ -39,21 +42,18 @@ public class ListSubmissions {
    * @param courseWorkId - identifier of the course work.
    * @return - list of student submissions.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
   public static List<StudentSubmission> listSubmissions(String courseId, String courseWorkId)
-      throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-    TODO(developer) - See https://developers.google.com/identity for
-     guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials =
-        GoogleCredentials.getApplicationDefault()
-            .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(credentials);
+      throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-                new NetHttpTransport(), GsonFactory.getDefaultInstance(), requestInitializer)
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
diff --git a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
index 252f51f5..13d439dd 100644
--- a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
+++ b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
@@ -15,9 +15,9 @@
 
 // [START classroom_modify_attachments_student_submissions_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
@@ -26,14 +26,20 @@
 import com.google.api.services.classroom.model.Link;
 import com.google.api.services.classroom.model.ModifyAttachmentsRequest;
 import com.google.api.services.classroom.model.StudentSubmission;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 
 /* Class to demonstrate the use of Classroom ModifyAttachments StudentSubmissions API. */
 public class ModifyAttachmentsStudentSubmission {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+
+
   /**
    * Modify attachments on a student submission.
    *
@@ -42,23 +48,20 @@ public class ModifyAttachmentsStudentSubmission {
    * @param id - identifier of the student submission.
    * @return - the modified student submission.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
   public static StudentSubmission modifyAttachments(String courseId, String courseWorkId, String id)
-      throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+      throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_modify_attachments_student_submissions_code_snippet]
 
diff --git a/classroom/snippets/src/main/java/PatchCourse.java b/classroom/snippets/src/main/java/PatchCourse.java
index e8c5d31b..afd85ba1 100644
--- a/classroom/snippets/src/main/java/PatchCourse.java
+++ b/classroom/snippets/src/main/java/PatchCourse.java
@@ -15,43 +15,46 @@
 
 // [START classroom_patch_course]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Course;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate the use of Classroom Patch Course API */
 public class PatchCourse {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+
   /**
    * Updates one or more fields in a course.
    *
    * @param courseId - Id of the course to update.
    * @return updated course
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static Course patchCourse(String courseId) throws IOException {
-        /* Load pre-authorized user credentials from the environment.
-           TODO(developer) - See https://developers.google.com/identity for
-            guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSES));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static Course patchCourse(String courseId) throws GeneralSecurityException, IOException {
+
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
-    // Create the classroom API client
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
     Course course = null;
     try {
       course = new Course()
diff --git a/classroom/snippets/src/main/java/PatchStudentSubmission.java b/classroom/snippets/src/main/java/PatchStudentSubmission.java
index 1690ef8e..7931179b 100644
--- a/classroom/snippets/src/main/java/PatchStudentSubmission.java
+++ b/classroom/snippets/src/main/java/PatchStudentSubmission.java
@@ -15,21 +15,26 @@
 
 // [START classroom_patch_student_submissions_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.StudentSubmission;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate the use of Classroom Patch StudentSubmissions API. */
 public class PatchStudentSubmission {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
   /**
    * Updates the draft grade and/or assigned grade of a student submission.
    *
@@ -38,23 +43,20 @@ public class PatchStudentSubmission {
    * @param id - identifier of the student submission.
    * @return - the updated student submission.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
   public static StudentSubmission patchStudentSubmission(String courseId, String courseWorkId,
-      String id) throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+      String id) throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_patch_student_submissions_code_snippet]
 
diff --git a/classroom/snippets/src/main/java/ReturnStudentSubmission.java b/classroom/snippets/src/main/java/ReturnStudentSubmission.java
index 6b40fc96..dcf8e7bd 100644
--- a/classroom/snippets/src/main/java/ReturnStudentSubmission.java
+++ b/classroom/snippets/src/main/java/ReturnStudentSubmission.java
@@ -15,20 +15,25 @@
 
 // [START classroom_return_student_submissions_class]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate the use of Classroom Return StudentSubmissions API. */
 public class ReturnStudentSubmission {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
   /**
    * Return a student submission back to the student which updates the submission state to `RETURNED`.
    *
@@ -36,23 +41,20 @@ public class ReturnStudentSubmission {
    * @param courseWorkId - identifier of the course work.
    * @param id - identifier of the student submission.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
   public static void returnSubmission(String courseId, String courseWorkId, String id)
-      throws IOException {
-   /* Load pre-authorized user credentials from the environment.
-     TODO(developer) - See https://developers.google.com/identity for
-      guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+      throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_return_student_submissions_code_snippet]
 
diff --git a/classroom/snippets/src/main/java/UpdateCourse.java b/classroom/snippets/src/main/java/UpdateCourse.java
index 9e0d63ed..431640c7 100644
--- a/classroom/snippets/src/main/java/UpdateCourse.java
+++ b/classroom/snippets/src/main/java/UpdateCourse.java
@@ -15,43 +15,45 @@
 
 // [START classroom_update_course]
 
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Course;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate the use of Classroom Update Course API */
 public class UpdateCourse {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
   /**
    * Updates a course's metadata.
    *
    * @param courseId - Id of the course to update.
    * @return updated course
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static Course updateCourse(String courseId) throws IOException {
-        /* Load pre-authorized user credentials from the environment.
-           TODO(developer) - See https://developers.google.com/identity for
-            guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSES));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static Course updateCourse(String courseId) throws GeneralSecurityException, IOException {
 
-    // Create the classroom API client
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     Course course = null;
     try {
diff --git a/classroom/snippets/src/test/java/TestGetCourse.java b/classroom/snippets/src/test/java/TestGetCourse.java
index c43059f7..ac95bda5 100644
--- a/classroom/snippets/src/test/java/TestGetCourse.java
+++ b/classroom/snippets/src/test/java/TestGetCourse.java
@@ -13,15 +13,17 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.Course;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
-import java.io.IOException;
 
 // Unit test class for Get Course classroom snippet
 public class TestGetCourse extends BaseTest {
 
   @Test
-  public void testGetCourse() throws IOException {
+  public void testGetCourse() throws GeneralSecurityException, IOException {
+    setup(GetCourse.SCOPES);
     Course course = GetCourse.getCourse(testCourse.getId());
     Assert.assertNotNull("Course not returned.", course);
     Assert.assertEquals("Wrong course returned.", testCourse.getId(), course.getId());
diff --git a/classroom/snippets/src/test/java/TestListCourseAliases.java b/classroom/snippets/src/test/java/TestListCourseAliases.java
index f18c1cce..3543f217 100644
--- a/classroom/snippets/src/test/java/TestListCourseAliases.java
+++ b/classroom/snippets/src/test/java/TestListCourseAliases.java
@@ -13,16 +13,18 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.CourseAlias;
-import org.junit.Assert;
-import org.junit.Test;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.List;
+import org.junit.Assert;
+import org.junit.Test;
 
 // Unit test class for List Course Aliases classroom snippet
 public class TestListCourseAliases extends BaseTest {
 
   @Test
-  public void testListCourseAliases() throws IOException {
+  public void testListCourseAliases() throws GeneralSecurityException, IOException {
+    setup(ListCourseAliases.SCOPES);
     List<CourseAlias> courseAliases = ListCourseAliases.listCourseAliases(testCourse.getId());
     Assert.assertTrue("Incorrect number of course aliases returned.", courseAliases.size() == 1);
   }
diff --git a/classroom/snippets/src/test/java/TestListCourses.java b/classroom/snippets/src/test/java/TestListCourses.java
index fe254b76..7a4dd553 100644
--- a/classroom/snippets/src/test/java/TestListCourses.java
+++ b/classroom/snippets/src/test/java/TestListCourses.java
@@ -13,16 +13,17 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.Course;
-import org.junit.Assert;
-import org.junit.Test;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.List;
+import org.junit.Assert;
+import org.junit.Test;
 
 // Unit test class for List Course classroom snippet
 public class TestListCourses {
 
   @Test
-  public void testListCourses() throws IOException {
+  public void testListCourses() throws GeneralSecurityException, IOException {
     List<Course> courses = ListCourses.listCourses();
     Assert.assertTrue("No courses returned.", courses.size() > 0);
   }
diff --git a/classroom/snippets/src/test/java/TestListSubmissions.java b/classroom/snippets/src/test/java/TestListSubmissions.java
index 148e9529..77d8c63e 100644
--- a/classroom/snippets/src/test/java/TestListSubmissions.java
+++ b/classroom/snippets/src/test/java/TestListSubmissions.java
@@ -14,6 +14,7 @@
 
 import com.google.api.services.classroom.model.StudentSubmission;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.List;
 import org.junit.Assert;
 import org.junit.Test;
@@ -22,7 +23,8 @@
 public class TestListSubmissions extends BaseTest {
 
   @Test
-  public void testListSubmissions() throws IOException {
+  public void testListSubmissions() throws GeneralSecurityException, IOException {
+    setup(ListSubmissions.SCOPES);
     List<StudentSubmission> submissions = ListSubmissions.listSubmissions(
         testCourse.getId(),
         "-");
diff --git a/classroom/snippets/src/test/java/TestPatchCourse.java b/classroom/snippets/src/test/java/TestPatchCourse.java
index 51e05a43..a7d0d92f 100644
--- a/classroom/snippets/src/test/java/TestPatchCourse.java
+++ b/classroom/snippets/src/test/java/TestPatchCourse.java
@@ -13,15 +13,17 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.Course;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
-import java.io.IOException;
 
 // Unit test class for Patch Course classroom snippet
 public class TestPatchCourse extends BaseTest {
 
   @Test
-  public void testPatchCourse() throws IOException {
+  public void testPatchCourse() throws GeneralSecurityException, IOException {
+    setup(PatchCourse.SCOPES);
     Course course = PatchCourse.patchCourse(testCourse.getId());
     Assert.assertNotNull("Course not returned.", course);
     Assert.assertEquals("Wrong course returned.", testCourse.getId(), course.getId());
diff --git a/classroom/snippets/src/test/java/TestUpdateCourse.java b/classroom/snippets/src/test/java/TestUpdateCourse.java
index f5e0080d..3c7cbda2 100644
--- a/classroom/snippets/src/test/java/TestUpdateCourse.java
+++ b/classroom/snippets/src/test/java/TestUpdateCourse.java
@@ -13,15 +13,17 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.Course;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
-import java.io.IOException;
 
 // Unit test class for Update Course classroom snippet
 public class TestUpdateCourse extends BaseTest {
 
   @Test
-  public void testUpdateCourse() throws IOException {
+  public void testUpdateCourse() throws GeneralSecurityException, IOException {
+    setup(UpdateCourse.SCOPES);
     Course course = UpdateCourse.updateCourse(testCourse.getId());
     Assert.assertNotNull("Course not returned.", course);
     Assert.assertEquals("Wrong course returned.", testCourse.getId(), course.getId());

From a351fd5048a418186b04bd4aeb1504f8f03df8ec Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 7 Feb 2023 13:01:17 -0500
Subject: [PATCH 37/50] updated auth for CreateCourseWithAlias

---
 .../src/main/java/CreateCourseWithAlias.java  | 38 ++++++++++---------
 .../test/java/TestCreateCourseWithAlias.java  |  4 +-
 2 files changed, 24 insertions(+), 18 deletions(-)

diff --git a/classroom/snippets/src/main/java/CreateCourseWithAlias.java b/classroom/snippets/src/main/java/CreateCourseWithAlias.java
index 77a6521b..c6b9ba0e 100644
--- a/classroom/snippets/src/main/java/CreateCourseWithAlias.java
+++ b/classroom/snippets/src/main/java/CreateCourseWithAlias.java
@@ -14,42 +14,46 @@
 
 
 // [START classroom_create_course_with_alias_class]
+
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.google.api.services.classroom.Classroom;
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Course;
-import com.google.auth.http.HttpCredentialsAdapter;
-import com.google.auth.oauth2.GoogleCredentials;
 import java.io.IOException;
-import java.util.Collections;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 /* Class to demonstrate how to create a course with an alias. */
 public class CreateCourseWithAlias {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+
   /**
    * Create a new course with an alias. Set the new course id to the desired alias.
    *
    * @return - newly created course.
    * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static Course createCourseWithAlias() throws IOException {
-    /* Load pre-authorized user credentials from the environment.
-       TODO(developer) - See https://developers.google.com/identity for
-        guides on implementing OAuth2 for your application. */
-    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
-        .createScoped(Collections.singleton(ClassroomScopes.CLASSROOM_COURSES));
-    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
-        credentials);
+  public static Course createCourseWithAlias() throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
-    Classroom service = new Classroom.Builder(new NetHttpTransport(),
-        GsonFactory.getDefaultInstance(),
-        requestInitializer)
-        .setApplicationName("Classroom samples")
-        .build();
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
 
     // [START classroom_create_course_with_alias_code_snippet]
 
diff --git a/classroom/snippets/src/test/java/TestCreateCourseWithAlias.java b/classroom/snippets/src/test/java/TestCreateCourseWithAlias.java
index 5152b984..13b704e7 100644
--- a/classroom/snippets/src/test/java/TestCreateCourseWithAlias.java
+++ b/classroom/snippets/src/test/java/TestCreateCourseWithAlias.java
@@ -15,6 +15,7 @@
 import com.google.api.services.classroom.model.Course;
 import com.google.api.services.classroom.model.CourseAlias;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.List;
 import org.junit.Assert;
 import org.junit.Test;
@@ -23,7 +24,8 @@
 public class TestCreateCourseWithAlias extends BaseTest {
 
   @Test
-  public void testCreateCourseWithAlias() throws IOException {
+  public void testCreateCourseWithAlias() throws GeneralSecurityException, IOException {
+    setup(CreateCourseWithAlias.SCOPES);
     Course course = CreateCourseWithAlias.createCourseWithAlias();
     List<CourseAlias> courseAliases = service.courses().aliases()
         .list(course.getId()

From f31c151a95c484a48ad73115ec401091e1ba4f14 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 7 Feb 2023 16:02:17 -0500
Subject: [PATCH 38/50] CreateInvitation code snippet

---
 .../src/main/java/CreateInvitation.java       | 91 +++++++++++++++++++
 .../src/test/java/TestCreateInvitation.java   | 34 +++++++
 2 files changed, 125 insertions(+)
 create mode 100644 classroom/snippets/src/main/java/CreateInvitation.java
 create mode 100644 classroom/snippets/src/test/java/TestCreateInvitation.java

diff --git a/classroom/snippets/src/main/java/CreateInvitation.java b/classroom/snippets/src/main/java/CreateInvitation.java
new file mode 100644
index 00000000..bf04633d
--- /dev/null
+++ b/classroom/snippets/src/main/java/CreateInvitation.java
@@ -0,0 +1,91 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// [START classroom_create_invitation]
+
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.Invitation;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+/* Class to demonstrate the use of Classroom Create Invitation API */
+public class CreateInvitation {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+    tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+
+  /**
+   * Create an invitation to allow a user to join a course.
+   *
+   * @param courseId - the course to invite the user to.
+   * @param userId - the user to be invited to the course.
+   * @return the created invitation.
+   * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
+   */
+  public static Invitation createInvitation(String courseId, String userId)
+      throws GeneralSecurityException, IOException {
+
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
+
+    // [START classroom_create_invitation_code_snippet]
+
+    Invitation invitation = null;
+    try {
+      /* Set the role the user is invited to have in the course. Possible values of CourseRole can be
+      found here: https://developers.google.com/classroom/reference/rest/v1/invitations#courserole.*/
+      Invitation content = new Invitation()
+          .setCourseId(courseId)
+          .setUserId(userId)
+          .setRole("TEACHER");
+
+      invitation = service.invitations().create(content).execute();
+
+      System.out.printf("User (%s) has been invited to course (%s)", invitation.getUserId(),
+          invitation.getCourseId());
+    } catch (GoogleJsonResponseException e) {
+      //TODO (developer) - handle error appropriately
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The course or user does not exist.\n");
+      }
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    return invitation;
+
+    // [END classroom_create_invitation_code_snippet]
+  }
+
+}
+// [END classroom_create_invitation]
\ No newline at end of file
diff --git a/classroom/snippets/src/test/java/TestCreateInvitation.java b/classroom/snippets/src/test/java/TestCreateInvitation.java
new file mode 100644
index 00000000..c6daeebc
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestCreateInvitation.java
@@ -0,0 +1,34 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.Invitation;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestCreateInvitation extends BaseTest {
+
+  private String userId = "insert_user_id";
+
+  @Test
+  public void testCreateInvitation() throws GeneralSecurityException, IOException {
+    setup(CreateInvitation.SCOPES);
+    Invitation invitation = CreateInvitation.createInvitation(testCourse.getId(), userId);
+    Assert.assertNotNull("Invitation not created", invitation);
+    Assert.assertEquals(invitation.getCourseId(), testCourse.getId());
+    Assert.assertEquals(invitation.getUserId(), userId);
+  }
+
+}

From fd73ed368b3fcde78482933842e906fb7a96ff36 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Wed, 8 Feb 2023 16:21:09 -0500
Subject: [PATCH 39/50] accept, create, delete invitation classes

---
 .../src/main/java/AcceptInvitation.java       | 72 ++++++++++++++++++
 .../src/main/java/CreateInvitation.java       |  2 +-
 .../src/main/java/DeleteInvitation.java       | 72 ++++++++++++++++++
 .../snippets/src/main/java/GetInvitation.java | 75 +++++++++++++++++++
 .../src/main/java/ListInvitations.java        |  2 +
 .../src/test/java/TestAcceptInvitation.java   | 31 ++++++++
 .../src/test/java/TestDeleteInvitation.java   | 34 +++++++++
 .../src/test/java/TestListInvitations.java    |  2 +
 8 files changed, 289 insertions(+), 1 deletion(-)
 create mode 100644 classroom/snippets/src/main/java/AcceptInvitation.java
 create mode 100644 classroom/snippets/src/main/java/DeleteInvitation.java
 create mode 100644 classroom/snippets/src/main/java/GetInvitation.java
 create mode 100644 classroom/snippets/src/main/java/ListInvitations.java
 create mode 100644 classroom/snippets/src/test/java/TestAcceptInvitation.java
 create mode 100644 classroom/snippets/src/test/java/TestDeleteInvitation.java
 create mode 100644 classroom/snippets/src/test/java/TestListInvitations.java

diff --git a/classroom/snippets/src/main/java/AcceptInvitation.java b/classroom/snippets/src/main/java/AcceptInvitation.java
new file mode 100644
index 00000000..7dd141f6
--- /dev/null
+++ b/classroom/snippets/src/main/java/AcceptInvitation.java
@@ -0,0 +1,72 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// [START classroom_accept_invitation]
+
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+/* Class to demonstrate the use of Classroom Accept Invitation API. */
+public class AcceptInvitation {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+
+  /**
+   * Accepts an invitation to a course by adding the user as the role specified in the invitation.
+   *
+   * @param id - the identifier of the invitation to accept.
+   * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
+   */
+  public static void acceptInvitation(String id) throws GeneralSecurityException, IOException {
+
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
+
+    // [START classroom_accept_invitation_code_snippet]
+    try {
+      service.invitations().accept(id).execute();
+      System.out.printf("Invitation (%s) was accepted.\n", id);
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The invitation id (%s) does not exist.\n", id);
+      }
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    // [END classroom_accept_invitation_code_snippet]
+  }
+}
+// [END classroom_accept_invitation]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/CreateInvitation.java b/classroom/snippets/src/main/java/CreateInvitation.java
index bf04633d..7e06b468 100644
--- a/classroom/snippets/src/main/java/CreateInvitation.java
+++ b/classroom/snippets/src/main/java/CreateInvitation.java
@@ -70,7 +70,7 @@ public static Invitation createInvitation(String courseId, String userId)
 
       invitation = service.invitations().create(content).execute();
 
-      System.out.printf("User (%s) has been invited to course (%s)", invitation.getUserId(),
+      System.out.printf("User (%s) has been invited to course (%s).\n", invitation.getUserId(),
           invitation.getCourseId());
     } catch (GoogleJsonResponseException e) {
       //TODO (developer) - handle error appropriately
diff --git a/classroom/snippets/src/main/java/DeleteInvitation.java b/classroom/snippets/src/main/java/DeleteInvitation.java
new file mode 100644
index 00000000..d11fee03
--- /dev/null
+++ b/classroom/snippets/src/main/java/DeleteInvitation.java
@@ -0,0 +1,72 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// [START classroom_delete_invitation]
+
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+/* Class to demonstrate the use of Classroom Delete Invitation API. */
+public class DeleteInvitation {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+
+  /**
+   * Deletes an invitation.
+   *
+   * @param id - the identifier of the invitation to delete.
+   * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
+   */
+  public static void deleteInvitation(String id) throws GeneralSecurityException, IOException {
+
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
+
+    // [START classroom_delete_invitation_code_snippet]
+    try {
+      service.invitations().delete(id).execute();
+      System.out.printf("Invitation (%s) was deleted.\n", id);
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The invitation id (%s) does not exist.\n", id);
+      }
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    // [END classroom_delete_invitation_code_snippet]
+  }
+}
+// [END classroom_delete_invitation]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/GetInvitation.java b/classroom/snippets/src/main/java/GetInvitation.java
new file mode 100644
index 00000000..1b921b7f
--- /dev/null
+++ b/classroom/snippets/src/main/java/GetInvitation.java
@@ -0,0 +1,75 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// [START classroom_get_invitation]
+
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.Invitation;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+/* Class to demonstrate the use of Classroom Get Invitation API */
+public class GetInvitation {
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+
+  /**
+   * Retrieves an invitation.
+   *
+   * @param id - the identifier of the invitation to retrieve.
+   * @return the specified invitation.
+   * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
+   */
+  public static Invitation getInvitation(String id) throws GeneralSecurityException, IOException {
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
+
+    // [START classroom_get_invitation_code_snippet]
+    Invitation invitation = null;
+    try {
+      invitation = service.invitations().get(id).execute();
+      System.out.printf("Invitation (%s) for user (%s) in course (%s) retrieved.\n",
+          invitation.getId(), invitation.getUserId(), invitation.getCourseId());
+    } catch (GoogleJsonResponseException e) {
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The invitation id (%s) does not exist.\n", id);
+      }
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    return invitation;
+    // [END classroom_get_invitation_code_snippet]
+  }
+}
+// [END classroom_get_invitation]
\ No newline at end of file
diff --git a/classroom/snippets/src/main/java/ListInvitations.java b/classroom/snippets/src/main/java/ListInvitations.java
new file mode 100644
index 00000000..64ea3585
--- /dev/null
+++ b/classroom/snippets/src/main/java/ListInvitations.java
@@ -0,0 +1,2 @@
+package PACKAGE_NAME;public class ListInvitations {
+}
diff --git a/classroom/snippets/src/test/java/TestAcceptInvitation.java b/classroom/snippets/src/test/java/TestAcceptInvitation.java
new file mode 100644
index 00000000..427c1b98
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestAcceptInvitation.java
@@ -0,0 +1,31 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestAcceptInvitation {
+
+  private String invitationId = "insert_invitation_id";
+
+  @Test
+  public void testAcceptInvitation() throws GeneralSecurityException, IOException {
+    AcceptInvitation.acceptInvitation(invitationId);
+    Assert.assertThrows(GoogleJsonResponseException.class,
+        () -> GetInvitation.getInvitation(invitationId));
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestDeleteInvitation.java b/classroom/snippets/src/test/java/TestDeleteInvitation.java
new file mode 100644
index 00000000..9d53a751
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestDeleteInvitation.java
@@ -0,0 +1,34 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.services.classroom.model.Invitation;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestDeleteInvitation extends BaseTest {
+
+  private String userId = "insert_user_id";
+
+  @Test
+  public void testDeleteInvitation() throws GeneralSecurityException, IOException {
+    setup(DeleteInvitation.SCOPES);
+    Invitation invitation = CreateInvitation.createInvitation(testCourse.getId(), userId);
+    DeleteInvitation.deleteInvitation(invitation.getId());
+    Assert.assertThrows(GoogleJsonResponseException.class,
+        () -> GetInvitation.getInvitation(invitation.getId()));
+  }
+}
diff --git a/classroom/snippets/src/test/java/TestListInvitations.java b/classroom/snippets/src/test/java/TestListInvitations.java
new file mode 100644
index 00000000..3e41c4a9
--- /dev/null
+++ b/classroom/snippets/src/test/java/TestListInvitations.java
@@ -0,0 +1,2 @@
+package PACKAGE_NAME;public class TestListInvitations {
+}

From c3965e2d31eccd21b9d32be5406660e68a978435 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Wed, 8 Feb 2023 16:23:32 -0500
Subject: [PATCH 40/50] list invitations class

---
 .../src/main/java/ListInvitations.java        | 102 +++++++++++++++++-
 .../src/test/java/TestListInvitations.java    |  33 +++++-
 2 files changed, 133 insertions(+), 2 deletions(-)

diff --git a/classroom/snippets/src/main/java/ListInvitations.java b/classroom/snippets/src/main/java/ListInvitations.java
index 64ea3585..fec0182e 100644
--- a/classroom/snippets/src/main/java/ListInvitations.java
+++ b/classroom/snippets/src/main/java/ListInvitations.java
@@ -1,2 +1,102 @@
-package PACKAGE_NAME;public class ListInvitations {
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// [START classroom_list_invitation]
+
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
+import com.google.api.client.googleapis.json.GoogleJsonError;
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+import com.google.api.services.classroom.Classroom;
+import com.google.api.services.classroom.ClassroomScopes;
+import com.google.api.services.classroom.model.Invitation;
+import com.google.api.services.classroom.model.ListInvitationsResponse;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/* Class to demonstrate the use of Classroom List Invitation API. */
+public class ListInvitations {
+
+  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
+  tokens/ folder. */
+  static ArrayList<String> SCOPES = new ArrayList<>(
+      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+
+  /**
+   * Returns a list of invitations that the requesting user is permitted to view,
+   * restricted to those that match the specified courseId and/or userId.
+   *
+   * @param courseId - a specified course.
+   * @param userId -  a specified userId.
+   * @return list of invitations for the specified courseId and/or userId.
+   * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
+   */
+  public static List<Invitation> listInvitations(String courseId, String userId)
+      throws GeneralSecurityException, IOException {
+
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
+
+    // [START classroom_list_invitation_code_snippet]
+    List<Invitation> invitations = new ArrayList<>();
+    String pageToken = null;
+    try {
+      do {
+        ListInvitationsResponse response = service.invitations().list()
+            .setCourseId(courseId)
+            .setUserId(userId)
+            .setPageToken(pageToken)
+            .execute();
+
+        /* Ensure that the response is not null before retrieving data from it to avoid errors. */
+        if (response.getInvitations() != null) {
+          invitations.addAll(response.getInvitations());
+          pageToken = response.getNextPageToken();
+        }
+      } while (pageToken != null);
+
+      if (invitations.isEmpty()) {
+        System.out.println("No invitations found.");
+      } else {
+        for (Invitation invitation : invitations) {
+          System.out.printf("Invitation id (%s).\n", invitation.getId());
+        }
+      }
+    } catch (GoogleJsonResponseException e) {
+      // TODO (developer) - handle error appropriately
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf("The courseId or userId does not exist.\n");
+      }
+      throw e;
+    } catch (Exception e) {
+      throw e;
+    }
+    return invitations;
+    // [END classroom_list_invitation_code_snippet]
+  }
 }
+// [END classroom_list_invitation]
\ No newline at end of file
diff --git a/classroom/snippets/src/test/java/TestListInvitations.java b/classroom/snippets/src/test/java/TestListInvitations.java
index 3e41c4a9..c601427f 100644
--- a/classroom/snippets/src/test/java/TestListInvitations.java
+++ b/classroom/snippets/src/test/java/TestListInvitations.java
@@ -1,2 +1,33 @@
-package PACKAGE_NAME;public class TestListInvitations {
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.api.services.classroom.model.Invitation;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import java.util.List;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestListInvitations extends BaseTest {
+
+  private String userId = "insert_user_id";
+
+  @Test
+  public void testListInvitations() throws GeneralSecurityException, IOException {
+    setup(ListInvitations.SCOPES);
+    CreateInvitation.createInvitation(testCourse.getId(), userId);
+    List<Invitation> invitationList = ListInvitations.listInvitations(testCourse.getId(), userId);
+    Assert.assertTrue("No invitations returned.", invitationList.size() > 0);
+  }
 }

From 6bf7c4affe8b3303adaa37f75c6a131617d656bf Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Wed, 8 Feb 2023 16:43:54 -0500
Subject: [PATCH 41/50] listAssignedGrades method in ListStudentSubmissions
 class

---
 .../src/main/java/ListStudentSubmissions.java | 67 ++++++++++++++++++-
 1 file changed, 66 insertions(+), 1 deletion(-)

diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index a0d6dc9e..a5389823 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -105,9 +105,74 @@ public static List<StudentSubmission> listStudentSubmissions(String courseId, St
       throw e;
     }
     return studentSubmissions;
-
     // [END classroom_list_student_submissions_code_snippet]
+  }
+
+  /**
+   * Lists all assigned grades for a particular coursework item.
+   *
+   * @param courseId - identifier of the course.
+   * @param courseWorkId - identifier of the course work.
+   * @throws IOException - if credentials file not found.
+   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
+   */
+  public static void listAssignedGrades(String courseId, String courseWorkId)
+      throws GeneralSecurityException, IOException {
+
+    // Create the classroom API client.
+    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+    Classroom service =
+        new Classroom.Builder(
+            HTTP_TRANSPORT,
+            GsonFactory.getDefaultInstance(),
+            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+            .setApplicationName("Classroom samples")
+            .build();
+
+    List<StudentSubmission> studentSubmissions = new ArrayList<>();
+    String pageToken = null;
+
+    try {
+      do {
+    // [START classroom_list_assigned_grades_code_snippet]
+        ListStudentSubmissionsResponse response =
+            service
+                .courses()
+                .courseWork()
+                .studentSubmissions()
+                .list(courseId, courseWorkId)
+                .setPageToken(pageToken)
+                .execute();
 
+        /* Ensure that the response is not null before retrieving data from it to avoid errors. */
+        if (response.getStudentSubmissions() != null) {
+          studentSubmissions.addAll(response.getStudentSubmissions());
+          pageToken = response.getNextPageToken();
+        }
+      } while (pageToken != null);
+
+      if (studentSubmissions.isEmpty()) {
+        System.out.println("No student submissions found.");
+      } else {
+        for (StudentSubmission submission : studentSubmissions) {
+          System.out.printf("User ID %s, Assigned grade: %s\n", submission.getUserId(),
+              submission.getAssignedGrade());
+        }
+      }
+    // [END classroom_list_assigned_grades_code_snippet]
+    } catch (GoogleJsonResponseException e) {
+      // TODO (developer) - handle error appropriately
+      GoogleJsonError error = e.getDetails();
+      if (error.getCode() == 404) {
+        System.out.printf(
+            "The courseId (%s) or courseWorkId (%s) does not exist.\n",
+            courseId, courseWorkId);
+      } else {
+        throw e;
+      }
+    } catch (Exception e) {
+      throw e;
+    }
   }
 }
 // [END classroom_list_student_submissions_class]

From 439948608b0ab6a08f254f5510735b81f4446e0f Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Wed, 8 Feb 2023 16:50:37 -0500
Subject: [PATCH 42/50] deleting ListInvitations classes until bug is fixed

---
 .../src/main/java/ListInvitations.java        | 102 ------------------
 .../src/test/java/TestListInvitations.java    |  33 ------
 2 files changed, 135 deletions(-)
 delete mode 100644 classroom/snippets/src/main/java/ListInvitations.java
 delete mode 100644 classroom/snippets/src/test/java/TestListInvitations.java

diff --git a/classroom/snippets/src/main/java/ListInvitations.java b/classroom/snippets/src/main/java/ListInvitations.java
deleted file mode 100644
index fec0182e..00000000
--- a/classroom/snippets/src/main/java/ListInvitations.java
+++ /dev/null
@@ -1,102 +0,0 @@
-// Copyright 2023 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// [START classroom_list_invitation]
-
-import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
-import com.google.api.client.googleapis.json.GoogleJsonError;
-import com.google.api.client.googleapis.json.GoogleJsonResponseException;
-import com.google.api.client.http.javanet.NetHttpTransport;
-import com.google.api.client.json.gson.GsonFactory;
-import com.google.api.services.classroom.Classroom;
-import com.google.api.services.classroom.ClassroomScopes;
-import com.google.api.services.classroom.model.Invitation;
-import com.google.api.services.classroom.model.ListInvitationsResponse;
-import java.io.IOException;
-import java.security.GeneralSecurityException;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-/* Class to demonstrate the use of Classroom List Invitation API. */
-public class ListInvitations {
-
-  /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-  tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
-
-  /**
-   * Returns a list of invitations that the requesting user is permitted to view,
-   * restricted to those that match the specified courseId and/or userId.
-   *
-   * @param courseId - a specified course.
-   * @param userId -  a specified userId.
-   * @return list of invitations for the specified courseId and/or userId.
-   * @throws IOException - if credentials file not found.
-   * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
-   */
-  public static List<Invitation> listInvitations(String courseId, String userId)
-      throws GeneralSecurityException, IOException {
-
-    // Create the classroom API client.
-    final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
-    Classroom service =
-        new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
-            .setApplicationName("Classroom samples")
-            .build();
-
-    // [START classroom_list_invitation_code_snippet]
-    List<Invitation> invitations = new ArrayList<>();
-    String pageToken = null;
-    try {
-      do {
-        ListInvitationsResponse response = service.invitations().list()
-            .setCourseId(courseId)
-            .setUserId(userId)
-            .setPageToken(pageToken)
-            .execute();
-
-        /* Ensure that the response is not null before retrieving data from it to avoid errors. */
-        if (response.getInvitations() != null) {
-          invitations.addAll(response.getInvitations());
-          pageToken = response.getNextPageToken();
-        }
-      } while (pageToken != null);
-
-      if (invitations.isEmpty()) {
-        System.out.println("No invitations found.");
-      } else {
-        for (Invitation invitation : invitations) {
-          System.out.printf("Invitation id (%s).\n", invitation.getId());
-        }
-      }
-    } catch (GoogleJsonResponseException e) {
-      // TODO (developer) - handle error appropriately
-      GoogleJsonError error = e.getDetails();
-      if (error.getCode() == 404) {
-        System.out.printf("The courseId or userId does not exist.\n");
-      }
-      throw e;
-    } catch (Exception e) {
-      throw e;
-    }
-    return invitations;
-    // [END classroom_list_invitation_code_snippet]
-  }
-}
-// [END classroom_list_invitation]
\ No newline at end of file
diff --git a/classroom/snippets/src/test/java/TestListInvitations.java b/classroom/snippets/src/test/java/TestListInvitations.java
deleted file mode 100644
index c601427f..00000000
--- a/classroom/snippets/src/test/java/TestListInvitations.java
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2023 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-import com.google.api.services.classroom.model.Invitation;
-import java.io.IOException;
-import java.security.GeneralSecurityException;
-import java.util.List;
-import org.junit.Assert;
-import org.junit.Test;
-
-public class TestListInvitations extends BaseTest {
-
-  private String userId = "insert_user_id";
-
-  @Test
-  public void testListInvitations() throws GeneralSecurityException, IOException {
-    setup(ListInvitations.SCOPES);
-    CreateInvitation.createInvitation(testCourse.getId(), userId);
-    List<Invitation> invitationList = ListInvitations.listInvitations(testCourse.getId(), userId);
-    Assert.assertTrue("No invitations returned.", invitationList.size() > 0);
-  }
-}

From 17325241b892262352614428cc408d747c68f4ce Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Thu, 9 Feb 2023 11:25:20 -0500
Subject: [PATCH 43/50] team review updates

---
 classroom/snippets/src/main/java/AcceptInvitation.java     | 2 +-
 classroom/snippets/src/main/java/CreateInvitation.java     | 2 +-
 classroom/snippets/src/main/java/GetInvitation.java        | 2 +-
 classroom/snippets/src/test/java/TestAcceptInvitation.java | 6 ++++++
 4 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/classroom/snippets/src/main/java/AcceptInvitation.java b/classroom/snippets/src/main/java/AcceptInvitation.java
index 7dd141f6..241a80c9 100644
--- a/classroom/snippets/src/main/java/AcceptInvitation.java
+++ b/classroom/snippets/src/main/java/AcceptInvitation.java
@@ -35,7 +35,7 @@ public class AcceptInvitation {
       Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
 
   /**
-   * Accepts an invitation to a course by adding the user as the role specified in the invitation.
+   * Accepts an invitation to a course.
    *
    * @param id - the identifier of the invitation to accept.
    * @throws IOException - if credentials file not found.
diff --git a/classroom/snippets/src/main/java/CreateInvitation.java b/classroom/snippets/src/main/java/CreateInvitation.java
index 7e06b468..b6a01588 100644
--- a/classroom/snippets/src/main/java/CreateInvitation.java
+++ b/classroom/snippets/src/main/java/CreateInvitation.java
@@ -27,7 +27,7 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 
-/* Class to demonstrate the use of Classroom Create Invitation API */
+/* Class to demonstrate the use of Classroom Create Invitation API. */
 public class CreateInvitation {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
diff --git a/classroom/snippets/src/main/java/GetInvitation.java b/classroom/snippets/src/main/java/GetInvitation.java
index 1b921b7f..b689d851 100644
--- a/classroom/snippets/src/main/java/GetInvitation.java
+++ b/classroom/snippets/src/main/java/GetInvitation.java
@@ -27,7 +27,7 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 
-/* Class to demonstrate the use of Classroom Get Invitation API */
+/* Class to demonstrate the use of Classroom Get Invitation API. */
 public class GetInvitation {
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
diff --git a/classroom/snippets/src/test/java/TestAcceptInvitation.java b/classroom/snippets/src/test/java/TestAcceptInvitation.java
index 427c1b98..d34c2d43 100644
--- a/classroom/snippets/src/test/java/TestAcceptInvitation.java
+++ b/classroom/snippets/src/test/java/TestAcceptInvitation.java
@@ -28,4 +28,10 @@ public void testAcceptInvitation() throws GeneralSecurityException, IOException
     Assert.assertThrows(GoogleJsonResponseException.class,
         () -> GetInvitation.getInvitation(invitationId));
   }
+
+  @Test
+  public void testAcceptInvitationWithInvalidId() {
+    Assert.assertThrows(GoogleJsonResponseException.class,
+        () -> AcceptInvitation.acceptInvitation("invalid-id"));
+  }
 }

From a1503fea556464576bdceeeb5973a7a867d6d917 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Thu, 9 Feb 2023 12:44:29 -0500
Subject: [PATCH 44/50] google java format for tests

---
 classroom/snippets/src/test/java/BaseTest.java         |  6 ++----
 .../snippets/src/test/java/TestAddAliasToCourse.java   | 10 ++++------
 classroom/snippets/src/test/java/TestAddStudent.java   | 10 +++++-----
 classroom/snippets/src/test/java/TestAddTeacher.java   |  6 +++---
 .../snippets/src/test/java/TestBatchAddStudents.java   |  5 ++---
 classroom/snippets/src/test/java/TestCreateCourse.java |  2 +-
 .../src/test/java/TestCreateCourseWithAlias.java       |  8 +++-----
 classroom/snippets/src/test/java/TestDeleteTopic.java  |  3 ++-
 .../snippets/src/test/java/TestListCourseAliases.java  |  2 +-
 .../snippets/src/test/java/TestListSubmissions.java    |  4 +---
 10 files changed, 24 insertions(+), 32 deletions(-)

diff --git a/classroom/snippets/src/test/java/BaseTest.java b/classroom/snippets/src/test/java/BaseTest.java
index cdad6755..d004570e 100644
--- a/classroom/snippets/src/test/java/BaseTest.java
+++ b/classroom/snippets/src/test/java/BaseTest.java
@@ -21,10 +21,7 @@
 import com.google.api.services.classroom.model.CourseAlias;
 import java.security.GeneralSecurityException;
 import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
 import org.junit.After;
-import org.junit.Before;
 
 import java.io.IOException;
 import java.util.UUID;
@@ -40,7 +37,8 @@ public class BaseTest {
    * @return an authorized Classroom client service
    * @throws IOException - if credentials file not found.
    */
-  protected Classroom buildService(ArrayList<String> SCOPES) throws GeneralSecurityException, IOException {
+  protected Classroom buildService(ArrayList<String> SCOPES)
+      throws GeneralSecurityException, IOException {
     /* Scopes required by this API call. If modifying these scopes, delete your previously saved
     tokens/ folder. */
     SCOPES.add(ClassroomScopes.CLASSROOM_COURSES);
diff --git a/classroom/snippets/src/test/java/TestAddAliasToCourse.java b/classroom/snippets/src/test/java/TestAddAliasToCourse.java
index 8bbfb289..4eb659eb 100644
--- a/classroom/snippets/src/test/java/TestAddAliasToCourse.java
+++ b/classroom/snippets/src/test/java/TestAddAliasToCourse.java
@@ -24,14 +24,12 @@ public class TestAddAliasToCourse extends BaseTest {
 
   @Test
   public void testAddCourseAlias() throws GeneralSecurityException, IOException {
-  // Include the scopes required to run the code example for testing purposes.
+    // Include the scopes required to run the code example for testing purposes.
     setup(AddAliasToCourse.SCOPES);
     CourseAlias courseAlias = AddAliasToCourse.addAliasToCourse(testCourse.getId());
-    List<CourseAlias> courseAliases = service.courses().aliases()
-        .list(testCourse.getId()
-        ).execute()
-        .getAliases();
+    List<CourseAlias> courseAliases =
+        service.courses().aliases().list(testCourse.getId()).execute().getAliases();
     Assert.assertNotNull("Course alias not returned.", courseAlias);
     Assert.assertTrue("No course aliases exist.", courseAliases.size() > 0);
   }
-}
\ No newline at end of file
+}
diff --git a/classroom/snippets/src/test/java/TestAddStudent.java b/classroom/snippets/src/test/java/TestAddStudent.java
index c1cc6e6f..980ef941 100644
--- a/classroom/snippets/src/test/java/TestAddStudent.java
+++ b/classroom/snippets/src/test/java/TestAddStudent.java
@@ -27,11 +27,11 @@ public class TestAddStudent extends BaseTest {
   public void testAddStudent() throws GeneralSecurityException, IOException {
     // Include the scopes required to run the code example for testing purposes.
     setup(AddStudent.SCOPES);
-    Student student = AddStudent.addStudent(testCourse.getId(), testCourse.getEnrollmentCode(),
-        this.studentId);
+    Student student =
+        AddStudent.addStudent(testCourse.getId(), testCourse.getEnrollmentCode(), this.studentId);
     Assert.assertNotNull("Student not returned.", student);
     Assert.assertNotNull("Course not returned.", student.getCourseId());
-    Assert.assertEquals("Student added to wrong course.", testCourse.getId(),
-        student.getCourseId());
+    Assert.assertEquals(
+        "Student added to wrong course.", testCourse.getId(), student.getCourseId());
   }
-}
\ No newline at end of file
+}
diff --git a/classroom/snippets/src/test/java/TestAddTeacher.java b/classroom/snippets/src/test/java/TestAddTeacher.java
index efa1cafc..09c86a29 100644
--- a/classroom/snippets/src/test/java/TestAddTeacher.java
+++ b/classroom/snippets/src/test/java/TestAddTeacher.java
@@ -29,7 +29,7 @@ public void testAddTeacher() throws GeneralSecurityException, IOException {
     setup(AddTeacher.SCOPES);
     Teacher teacher = AddTeacher.addTeacher(testCourse.getId(), this.teacherEmail);
     Assert.assertNotNull("Teacher not returned.", teacher);
-    Assert.assertEquals("Teacher added to wrong course.", testCourse.getId(),
-        teacher.getCourseId());
+    Assert.assertEquals(
+        "Teacher added to wrong course.", testCourse.getId(), teacher.getCourseId());
   }
-}
\ No newline at end of file
+}
diff --git a/classroom/snippets/src/test/java/TestBatchAddStudents.java b/classroom/snippets/src/test/java/TestBatchAddStudents.java
index cfa1f4c7..b185f28b 100644
--- a/classroom/snippets/src/test/java/TestBatchAddStudents.java
+++ b/classroom/snippets/src/test/java/TestBatchAddStudents.java
@@ -24,8 +24,7 @@ public class TestBatchAddStudents extends BaseTest {
   @Test
   public void testBatchAddStudents() throws GeneralSecurityException, IOException {
     setup(BatchAddStudents.SCOPES);
-    List<String> studentEmails = Arrays.asList("insert_student_1_email",
-        "insert_student_2_email");
+    List<String> studentEmails = Arrays.asList("insert_student_1_email", "insert_student_2_email");
     BatchAddStudents.batchAddStudents(testCourse.getId(), studentEmails);
   }
-}
\ No newline at end of file
+}
diff --git a/classroom/snippets/src/test/java/TestCreateCourse.java b/classroom/snippets/src/test/java/TestCreateCourse.java
index 86200500..5606b101 100644
--- a/classroom/snippets/src/test/java/TestCreateCourse.java
+++ b/classroom/snippets/src/test/java/TestCreateCourse.java
@@ -23,7 +23,7 @@ public class TestCreateCourse extends BaseTest {
 
   @Test
   public void testCreateCourse() throws GeneralSecurityException, IOException {
-  // Include the scopes required to run the code example for testing purposes.
+    // Include the scopes required to run the code example for testing purposes.
     setup(CreateCourse.SCOPES);
     Course course = CreateCourse.createCourse();
     Assert.assertNotNull("Course not returned.", course);
diff --git a/classroom/snippets/src/test/java/TestCreateCourseWithAlias.java b/classroom/snippets/src/test/java/TestCreateCourseWithAlias.java
index 13b704e7..2d906fbf 100644
--- a/classroom/snippets/src/test/java/TestCreateCourseWithAlias.java
+++ b/classroom/snippets/src/test/java/TestCreateCourseWithAlias.java
@@ -27,12 +27,10 @@ public class TestCreateCourseWithAlias extends BaseTest {
   public void testCreateCourseWithAlias() throws GeneralSecurityException, IOException {
     setup(CreateCourseWithAlias.SCOPES);
     Course course = CreateCourseWithAlias.createCourseWithAlias();
-    List<CourseAlias> courseAliases = service.courses().aliases()
-        .list(course.getId()
-        ).execute()
-        .getAliases();
+    List<CourseAlias> courseAliases =
+        service.courses().aliases().list(course.getId()).execute().getAliases();
     Assert.assertNotNull("Course not returned.", course);
     Assert.assertTrue("No course aliases exist.", courseAliases.size() > 0);
     deleteCourse(course.getId());
   }
-}
\ No newline at end of file
+}
diff --git a/classroom/snippets/src/test/java/TestDeleteTopic.java b/classroom/snippets/src/test/java/TestDeleteTopic.java
index a77a2b91..bffff20d 100644
--- a/classroom/snippets/src/test/java/TestDeleteTopic.java
+++ b/classroom/snippets/src/test/java/TestDeleteTopic.java
@@ -26,7 +26,8 @@ public void testDeleteTopic() throws GeneralSecurityException, IOException {
     setup(DeleteTopic.SCOPES);
     Topic topic = CreateTopic.createTopic(testCourse.getId());
     DeleteTopic.deleteTopic(testCourse.getId(), topic.getTopicId());
-    Assert.assertThrows(GoogleJsonResponseException.class,
+    Assert.assertThrows(
+        GoogleJsonResponseException.class,
         () -> GetTopic.getTopic(testCourse.getId(), topic.getTopicId()));
   }
 }
diff --git a/classroom/snippets/src/test/java/TestListCourseAliases.java b/classroom/snippets/src/test/java/TestListCourseAliases.java
index 3543f217..d3e357b5 100644
--- a/classroom/snippets/src/test/java/TestListCourseAliases.java
+++ b/classroom/snippets/src/test/java/TestListCourseAliases.java
@@ -28,4 +28,4 @@ public void testListCourseAliases() throws GeneralSecurityException, IOException
     List<CourseAlias> courseAliases = ListCourseAliases.listCourseAliases(testCourse.getId());
     Assert.assertTrue("Incorrect number of course aliases returned.", courseAliases.size() == 1);
   }
-}
\ No newline at end of file
+}
diff --git a/classroom/snippets/src/test/java/TestListSubmissions.java b/classroom/snippets/src/test/java/TestListSubmissions.java
index 77d8c63e..1649e926 100644
--- a/classroom/snippets/src/test/java/TestListSubmissions.java
+++ b/classroom/snippets/src/test/java/TestListSubmissions.java
@@ -25,9 +25,7 @@ public class TestListSubmissions extends BaseTest {
   @Test
   public void testListSubmissions() throws GeneralSecurityException, IOException {
     setup(ListSubmissions.SCOPES);
-    List<StudentSubmission> submissions = ListSubmissions.listSubmissions(
-        testCourse.getId(),
-        "-");
+    List<StudentSubmission> submissions = ListSubmissions.listSubmissions(testCourse.getId(), "-");
     Assert.assertNotNull("No submissions returned.", submissions);
   }
 }

From 8ae450a1a1880d6a2f1359621586aec024db2288 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Thu, 9 Feb 2023 12:57:06 -0500
Subject: [PATCH 45/50] google-java-format on classes

---
 .../src/main/java/AddAliasToCourse.java       | 17 +++---
 .../snippets/src/main/java/AddStudent.java    | 27 +++++----
 .../snippets/src/main/java/AddTeacher.java    | 17 +++---
 .../src/main/java/BatchAddStudents.java       | 35 ++++++------
 .../snippets/src/main/java/CreateCourse.java  | 38 +++++++------
 .../src/main/java/CreateCourseWithAlias.java  | 30 +++++-----
 .../src/main/java/CreateCourseWork.java       | 43 +++++++-------
 .../snippets/src/main/java/CreateTopic.java   | 14 ++---
 .../snippets/src/main/java/DeleteTopic.java   |  1 -
 .../snippets/src/main/java/GetCourse.java     | 12 ++--
 .../snippets/src/main/java/GetTopic.java      | 12 ++--
 .../src/main/java/ListCourseAliases.java      | 24 ++++----
 .../snippets/src/main/java/ListCourses.java   | 18 +++---
 .../src/main/java/ListStudentSubmissions.java | 12 ++--
 .../src/main/java/ListSubmissions.java        |  9 +--
 .../snippets/src/main/java/ListTopics.java    | 10 ++--
 .../ModifyAttachmentsStudentSubmission.java   | 46 ++++++++-------
 .../snippets/src/main/java/PatchCourse.java   | 20 +++----
 .../src/main/java/PatchStudentSubmission.java | 56 +++++++++++--------
 .../main/java/ReturnStudentSubmission.java    | 27 +++++----
 .../snippets/src/main/java/UpdateCourse.java  | 15 +++--
 .../snippets/src/main/java/UpdateTopic.java   | 22 +++++---
 .../snippets/src/test/java/BaseTest.java      |  5 +-
 .../src/test/java/TestAddStudent.java         |  2 +-
 .../src/test/java/TestAddTeacher.java         |  2 +-
 .../src/test/java/TestBatchAddStudents.java   |  4 +-
 .../src/test/java/TestCreateCourse.java       |  2 +-
 27 files changed, 276 insertions(+), 244 deletions(-)

diff --git a/classroom/snippets/src/main/java/AddAliasToCourse.java b/classroom/snippets/src/main/java/AddAliasToCourse.java
index 8187e44f..720dccec 100644
--- a/classroom/snippets/src/main/java/AddAliasToCourse.java
+++ b/classroom/snippets/src/main/java/AddAliasToCourse.java
@@ -31,7 +31,8 @@
 public class AddAliasToCourse {
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
 
   /**
    * Add an alias on an existing course.
@@ -48,9 +49,9 @@ public static CourseAlias addAliasToCourse(String courseId)
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -58,16 +59,14 @@ public static CourseAlias addAliasToCourse(String courseId)
 
     /* Create a new CourseAlias object with a project-wide alias. Project-wide aliases use a prefix
     of "p:" and can only be seen and used by the application that created them. */
-    CourseAlias content = new CourseAlias()
-        .setAlias("p:biology_10");
+    CourseAlias content = new CourseAlias().setAlias("p:biology_10");
     CourseAlias courseAlias = null;
 
     try {
-      courseAlias = service.courses().aliases().create(courseId, content)
-          .execute();
+      courseAlias = service.courses().aliases().create(courseId, content).execute();
       System.out.printf("Course alias created: %s \n", courseAlias.getAlias());
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 409) {
         System.out.printf("The course alias already exists: %s.\n", content);
diff --git a/classroom/snippets/src/main/java/AddStudent.java b/classroom/snippets/src/main/java/AddStudent.java
index e87ac1ff..6331f3ed 100644
--- a/classroom/snippets/src/main/java/AddStudent.java
+++ b/classroom/snippets/src/main/java/AddStudent.java
@@ -31,9 +31,9 @@
 public class AddStudent {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-      tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+  tokens/ folder. */
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
 
   /**
    * Add a student in a specified course.
@@ -51,20 +51,25 @@ public static Student addStudent(String courseId, String enrollmentCode, String
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
     Student student = new Student().setUserId(studentId);
     try {
       // Enrolling a student to a specified course
-      student = service.courses().students().create(courseId, student)
-          .setEnrollmentCode(enrollmentCode)
-          .execute();
+      student =
+          service
+              .courses()
+              .students()
+              .create(courseId, student)
+              .setEnrollmentCode(enrollmentCode)
+              .execute();
       // Prints the course id with the Student name
-      System.out.printf("User '%s' was enrolled as a student in the course with ID '%s'.\n",
+      System.out.printf(
+          "User '%s' was enrolled as a student in the course with ID '%s'.\n",
           student.getProfile().getName().getFullName(), courseId);
     } catch (GoogleJsonResponseException e) {
       // TODO(developer) - handle error appropriately
@@ -80,4 +85,4 @@ public static Student addStudent(String courseId, String enrollmentCode, String
     return student;
   }
 }
-// [END classroom_add_student]
\ No newline at end of file
+// [END classroom_add_student]
diff --git a/classroom/snippets/src/main/java/AddTeacher.java b/classroom/snippets/src/main/java/AddTeacher.java
index 7f07a661..4c843721 100644
--- a/classroom/snippets/src/main/java/AddTeacher.java
+++ b/classroom/snippets/src/main/java/AddTeacher.java
@@ -31,9 +31,9 @@
 public class AddTeacher {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-    tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+  tokens/ folder. */
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
 
   /**
    * Add teacher to a specific course.
@@ -51,9 +51,9 @@ public static Teacher addTeacher(String courseId, String teacherEmail)
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -62,7 +62,8 @@ public static Teacher addTeacher(String courseId, String teacherEmail)
       // Add a teacher to a specified course
       teacher = service.courses().teachers().create(courseId, teacher).execute();
       // Prints the course id with the teacher name
-      System.out.printf("User '%s' was added as a teacher to the course with ID '%s'.\n",
+      System.out.printf(
+          "User '%s' was added as a teacher to the course with ID '%s'.\n",
           teacher.getProfile().getName().getFullName(), courseId);
     } catch (GoogleJsonResponseException e) {
       // TODO(developer) - handle error appropriately
@@ -78,4 +79,4 @@ public static Teacher addTeacher(String courseId, String teacherEmail)
     return teacher;
   }
 }
-// [END classroom_add_teacher]
\ No newline at end of file
+// [END classroom_add_teacher]
diff --git a/classroom/snippets/src/main/java/BatchAddStudents.java b/classroom/snippets/src/main/java/BatchAddStudents.java
index 9e2cf6e0..d4a54c2e 100644
--- a/classroom/snippets/src/main/java/BatchAddStudents.java
+++ b/classroom/snippets/src/main/java/BatchAddStudents.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_batch_add_students]
 
 import com.google.api.client.googleapis.batch.BatchRequest;
@@ -36,13 +35,13 @@ public class BatchAddStudents {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
 
   /**
    * Add multiple students in a specified course.
    *
-   * @param courseId      - Id of the course to add students.
+   * @param courseId - Id of the course to add students.
    * @param studentEmails - Email address of the students.
    * @throws IOException - if credentials file not found.
    * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
@@ -54,23 +53,25 @@ public static void batchAddStudents(String courseId, List<String> studentEmails)
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
     BatchRequest batch = service.batch();
-    JsonBatchCallback<Student> callback = new JsonBatchCallback<>() {
-      public void onSuccess(Student student, HttpHeaders responseHeaders) {
-        System.out.printf("User '%s' was added as a student to the course.\n",
-            student.getProfile().getName().getFullName());
-      }
+    JsonBatchCallback<Student> callback =
+        new JsonBatchCallback<>() {
+          public void onSuccess(Student student, HttpHeaders responseHeaders) {
+            System.out.printf(
+                "User '%s' was added as a student to the course.\n",
+                student.getProfile().getName().getFullName());
+          }
 
-      public void onFailure(GoogleJsonError error, HttpHeaders responseHeaders) {
-        System.out.printf("Error adding student to the course: %s\n", error.getMessage());
-      }
-    };
+          public void onFailure(GoogleJsonError error, HttpHeaders responseHeaders) {
+            System.out.printf("Error adding student to the course: %s\n", error.getMessage());
+          }
+        };
     for (String studentEmail : studentEmails) {
       Student student = new Student().setUserId(studentEmail);
       service.courses().students().create(courseId, student).queue(batch, callback);
@@ -78,4 +79,4 @@ public void onFailure(GoogleJsonError error, HttpHeaders responseHeaders) {
     batch.execute();
   }
 }
-// [END classroom_batch_add_students]
\ No newline at end of file
+// [END classroom_batch_add_students]
diff --git a/classroom/snippets/src/main/java/CreateCourse.java b/classroom/snippets/src/main/java/CreateCourse.java
index 73f49e1f..95f7353c 100644
--- a/classroom/snippets/src/main/java/CreateCourse.java
+++ b/classroom/snippets/src/main/java/CreateCourse.java
@@ -30,8 +30,9 @@
 /* Class to demonstrate the use of Classroom Create Course API */
 public class CreateCourse {
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-      tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+  tokens/ folder. */
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
 
   /**
    * Creates a course
@@ -46,26 +47,29 @@ public static Course createCourse() throws GeneralSecurityException, IOException
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
     Course course = null;
     try {
       // Adding a new course with description. Set CourseState to `ACTIVE`. Possible values of
-      // CourseState can be found here: https://developers.google.com/classroom/reference/rest/v1/courses#coursestate
-      course = new Course()
-          .setName("10th Grade Biology")
-          .setSection("Period 2")
-          .setDescriptionHeading("Welcome to 10th Grade Biology")
-          .setDescription("We'll be learning about about the structure of living creatures "
-              + "from a combination of textbooks, guest lectures, and lab work. Expect "
-              + "to be excited!")
-          .setRoom("301")
-          .setOwnerId("me")
-          .setCourseState("ACTIVE");
+      // CourseState can be found here:
+      // https://developers.google.com/classroom/reference/rest/v1/courses#coursestate
+      course =
+          new Course()
+              .setName("10th Grade Biology")
+              .setSection("Period 2")
+              .setDescriptionHeading("Welcome to 10th Grade Biology")
+              .setDescription(
+                  "We'll be learning about about the structure of living creatures "
+                      + "from a combination of textbooks, guest lectures, and lab work. Expect "
+                      + "to be excited!")
+              .setRoom("301")
+              .setOwnerId("me")
+              .setCourseState("ACTIVE");
       course = service.courses().create(course).execute();
       // Prints the new created course Id and name
       System.out.printf("Course created: %s (%s)\n", course.getName(), course.getId());
@@ -80,4 +84,4 @@ public static Course createCourse() throws GeneralSecurityException, IOException
     return course;
   }
 }
-// [END classroom_create_course]
\ No newline at end of file
+// [END classroom_create_course]
diff --git a/classroom/snippets/src/main/java/CreateCourseWithAlias.java b/classroom/snippets/src/main/java/CreateCourseWithAlias.java
index c6b9ba0e..c676b973 100644
--- a/classroom/snippets/src/main/java/CreateCourseWithAlias.java
+++ b/classroom/snippets/src/main/java/CreateCourseWithAlias.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_create_course_with_alias_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -32,9 +31,9 @@
 public class CreateCourseWithAlias {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-    tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+  tokens/ folder. */
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
 
   /**
    * Create a new course with an alias. Set the new course id to the desired alias.
@@ -49,9 +48,9 @@ public static Course createCourseWithAlias() throws GeneralSecurityException, IO
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -61,20 +60,21 @@ public static Course createCourseWithAlias() throws GeneralSecurityException, IO
 
     /* Create a new Course with the alias set as the id field. Project-wide aliases use a prefix
     of "p:" and can only be seen and used by the application that created them. */
-    Course content = new Course()
-        .setId("p:history_4_2022")
-        .setName("9th Grade History")
-        .setSection("Period 4")
-        .setDescriptionHeading("Welcome to 9th Grade History.")
-        .setOwnerId("me")
-        .setCourseState("PROVISIONED");
+    Course content =
+        new Course()
+            .setId("p:history_4_2022")
+            .setName("9th Grade History")
+            .setSection("Period 4")
+            .setDescriptionHeading("Welcome to 9th Grade History.")
+            .setOwnerId("me")
+            .setCourseState("PROVISIONED");
 
     try {
       course = service.courses().create(content).execute();
       // Prints the new created course id and name
       System.out.printf("Course created: %s (%s)\n", course.getName(), course.getId());
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 409) {
         System.out.printf("The course alias already exists: %s.\n", content.getId());
diff --git a/classroom/snippets/src/main/java/CreateCourseWork.java b/classroom/snippets/src/main/java/CreateCourseWork.java
index 32afb896..5d6c948d 100644
--- a/classroom/snippets/src/main/java/CreateCourseWork.java
+++ b/classroom/snippets/src/main/java/CreateCourseWork.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_create_coursework_class]
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
 import com.google.api.client.googleapis.json.GoogleJsonError;
@@ -34,9 +33,9 @@
 public class CreateCourseWork {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-    tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+  tokens/ folder. */
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
 
   /**
    * Creates course work.
@@ -53,9 +52,9 @@ public static CourseWork createCourseWork(String courseId)
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -64,9 +63,10 @@ public static CourseWork createCourseWork(String courseId)
     CourseWork courseWork = null;
     try {
       // Create a link to add as a material on course work.
-      Link articleLink = new Link()
-          .setTitle("SR-71 Blackbird")
-          .setUrl("https://www.lockheedmartin.com/en-us/news/features/history/blackbird.html");
+      Link articleLink =
+          new Link()
+              .setTitle("SR-71 Blackbird")
+              .setUrl("https://www.lockheedmartin.com/en-us/news/features/history/blackbird.html");
 
       // Create a list of Materials to add to course work.
       List<Material> materials = Arrays.asList(new Material().setLink(articleLink));
@@ -76,21 +76,22 @@ public static CourseWork createCourseWork(String courseId)
       https://developers.google.com/classroom/reference/rest/v1/CourseWorkType
       Set state to `PUBLISHED`. Possible values of state can be found here:
       https://developers.google.com/classroom/reference/rest/v1/courses.courseWork#courseworkstate */
-      CourseWork content = new CourseWork()
-          .setTitle("Supersonic aviation")
-          .setDescription("Read about how the SR-71 Blackbird, the world’s fastest and "
-              + "highest-flying manned aircraft, was built.")
-          .setMaterials(materials)
-          .setWorkType("ASSIGNMENT")
-          .setState("PUBLISHED");
+      CourseWork content =
+          new CourseWork()
+              .setTitle("Supersonic aviation")
+              .setDescription(
+                  "Read about how the SR-71 Blackbird, the world’s fastest and "
+                      + "highest-flying manned aircraft, was built.")
+              .setMaterials(materials)
+              .setWorkType("ASSIGNMENT")
+              .setState("PUBLISHED");
 
-      courseWork = service.courses().courseWork().create(courseId, content)
-          .execute();
+      courseWork = service.courses().courseWork().create(courseId, content).execute();
 
       /* Prints the created courseWork. */
       System.out.printf("CourseWork created: %s\n", courseWork.getTitle());
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf("The courseId does not exist: %s.\n", courseId);
@@ -106,4 +107,4 @@ public static CourseWork createCourseWork(String courseId)
     // [END classroom_create_coursework_code_snippet]
   }
 }
-// [END classroom_create_coursework_class]
\ No newline at end of file
+// [END classroom_create_coursework_class]
diff --git a/classroom/snippets/src/main/java/CreateTopic.java b/classroom/snippets/src/main/java/CreateTopic.java
index f09aa875..1be964a3 100644
--- a/classroom/snippets/src/main/java/CreateTopic.java
+++ b/classroom/snippets/src/main/java/CreateTopic.java
@@ -31,9 +31,9 @@
 public class CreateTopic {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-    tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
+  tokens/ folder. */
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
 
   /**
    * Create a new topic in a course.
@@ -49,9 +49,9 @@ public static Topic createTopic(String courseId) throws GeneralSecurityException
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -64,7 +64,7 @@ public static Topic createTopic(String courseId) throws GeneralSecurityException
       topic = service.courses().topics().create(courseId, content).execute();
       System.out.println("Topic id: " + topic.getTopicId() + "\n" + "Course id: " + courseId);
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf("The courseId does not exist: %s.\n", courseId);
diff --git a/classroom/snippets/src/main/java/DeleteTopic.java b/classroom/snippets/src/main/java/DeleteTopic.java
index b94ce294..9508db3f 100644
--- a/classroom/snippets/src/main/java/DeleteTopic.java
+++ b/classroom/snippets/src/main/java/DeleteTopic.java
@@ -15,7 +15,6 @@
 // [START classroom_delete_topic_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
-import com.google.api.client.googleapis.json.GoogleJsonError;
 import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
diff --git a/classroom/snippets/src/main/java/GetCourse.java b/classroom/snippets/src/main/java/GetCourse.java
index 1efea231..94d07f75 100644
--- a/classroom/snippets/src/main/java/GetCourse.java
+++ b/classroom/snippets/src/main/java/GetCourse.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_get_course]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -33,7 +32,8 @@ public class GetCourse {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
 
   /**
    * Retrieve a single course's metadata.
@@ -49,9 +49,9 @@ public static Course getCourse(String courseId) throws GeneralSecurityException,
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -71,4 +71,4 @@ public static Course getCourse(String courseId) throws GeneralSecurityException,
     return course;
   }
 }
-// [END classroom_get_course]
\ No newline at end of file
+// [END classroom_get_course]
diff --git a/classroom/snippets/src/main/java/GetTopic.java b/classroom/snippets/src/main/java/GetTopic.java
index facf7ea5..5fb42012 100644
--- a/classroom/snippets/src/main/java/GetTopic.java
+++ b/classroom/snippets/src/main/java/GetTopic.java
@@ -32,8 +32,8 @@ public class GetTopic {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
 
   /**
    * Get a topic in a course.
@@ -51,9 +51,9 @@ public static Topic getTopic(String courseId, String topicId)
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -65,7 +65,7 @@ public static Topic getTopic(String courseId, String topicId)
       topic = service.courses().topics().get(courseId, topicId).execute();
       System.out.printf("Topic '%s' found.\n", topic.getName());
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf("The courseId or topicId does not exist: %s, %s.\n", courseId, topicId);
diff --git a/classroom/snippets/src/main/java/ListCourseAliases.java b/classroom/snippets/src/main/java/ListCourseAliases.java
index 3a6a93cc..dbec2299 100644
--- a/classroom/snippets/src/main/java/ListCourseAliases.java
+++ b/classroom/snippets/src/main/java/ListCourseAliases.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_list_aliases_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -35,7 +34,8 @@ public class ListCourseAliases {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
 
   /**
    * Retrieve the aliases for a course.
@@ -52,9 +52,9 @@ public static List<CourseAlias> listCourseAliases(String courseId)
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -66,10 +66,14 @@ public static List<CourseAlias> listCourseAliases(String courseId)
     try {
       // List of aliases of specified course
       do {
-        ListCourseAliasesResponse response = service.courses().aliases().list(courseId)
-            .setPageSize(100)
-            .setPageToken(pageToken)
-            .execute();
+        ListCourseAliasesResponse response =
+            service
+                .courses()
+                .aliases()
+                .list(courseId)
+                .setPageSize(100)
+                .setPageToken(pageToken)
+                .execute();
         courseAliases.addAll(response.getAliases());
         pageToken = response.getNextPageToken();
       } while (pageToken != null);
@@ -96,4 +100,4 @@ public static List<CourseAlias> listCourseAliases(String courseId)
     // [END classroom_list_aliases_code_snippet]
   }
 }
-// [END classroom_list_aliases_class]
\ No newline at end of file
+// [END classroom_list_aliases_class]
diff --git a/classroom/snippets/src/main/java/ListCourses.java b/classroom/snippets/src/main/java/ListCourses.java
index 3ba78a13..c5a00b25 100644
--- a/classroom/snippets/src/main/java/ListCourses.java
+++ b/classroom/snippets/src/main/java/ListCourses.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_list_courses]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -33,7 +32,8 @@ public class ListCourses {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
 
   /**
    * Retrieves all courses with metadata
@@ -48,9 +48,9 @@ public static List<Course> listCourses() throws GeneralSecurityException, IOExce
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -59,10 +59,8 @@ public static List<Course> listCourses() throws GeneralSecurityException, IOExce
 
     try {
       do {
-        ListCoursesResponse response = service.courses().list()
-            .setPageSize(100)
-            .setPageToken(pageToken)
-            .execute();
+        ListCoursesResponse response =
+            service.courses().list().setPageSize(100).setPageToken(pageToken).execute();
         courses.addAll(response.getCourses());
         pageToken = response.getNextPageToken();
       } while (pageToken != null);
@@ -82,4 +80,4 @@ public static List<Course> listCourses() throws GeneralSecurityException, IOExce
     return courses;
   }
 }
-// [END classroom_list_courses]
\ No newline at end of file
+// [END classroom_list_courses]
diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index a0d6dc9e..acd6598a 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -34,7 +34,8 @@ public class ListStudentSubmissions {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
 
   /**
    * Retrieves a specific student's submissions for the specified course work.
@@ -46,16 +47,17 @@ public class ListStudentSubmissions {
    * @throws IOException - if credentials file not found.
    * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static List<StudentSubmission> listStudentSubmissions(String courseId, String courseWorkId, String userId)
+  public static List<StudentSubmission> listStudentSubmissions(
+      String courseId, String courseWorkId, String userId)
       throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
diff --git a/classroom/snippets/src/main/java/ListSubmissions.java b/classroom/snippets/src/main/java/ListSubmissions.java
index 84bf5fa6..105c9b41 100644
--- a/classroom/snippets/src/main/java/ListSubmissions.java
+++ b/classroom/snippets/src/main/java/ListSubmissions.java
@@ -34,7 +34,8 @@ public class ListSubmissions {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
   /**
    * Retrieves submissions for all students for the specified course work in a course.
    *
@@ -51,9 +52,9 @@ public static List<StudentSubmission> listSubmissions(String courseId, String co
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
diff --git a/classroom/snippets/src/main/java/ListTopics.java b/classroom/snippets/src/main/java/ListTopics.java
index f2e2dd0c..ea35cf90 100644
--- a/classroom/snippets/src/main/java/ListTopics.java
+++ b/classroom/snippets/src/main/java/ListTopics.java
@@ -34,8 +34,8 @@ public class ListTopics {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
 
   /**
    * List topics in a course.
@@ -52,9 +52,9 @@ public static List<Topic> listTopics(String courseId)
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
diff --git a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
index 13d439dd..d047ac2b 100644
--- a/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
+++ b/classroom/snippets/src/main/java/ModifyAttachmentsStudentSubmission.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_modify_attachments_student_submissions_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -35,10 +34,9 @@
 public class ModifyAttachmentsStudentSubmission {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-    tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
-
+  tokens/ folder. */
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
 
   /**
    * Modify attachments on a student submission.
@@ -57,9 +55,9 @@ public static StudentSubmission modifyAttachments(String courseId, String course
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -70,28 +68,34 @@ public static StudentSubmission modifyAttachments(String courseId, String course
       // Create ModifyAttachmentRequest object that includes a new attachment with a link.
       Link link = new Link().setUrl("https://en.wikipedia.org/wiki/Irrational_number");
       Attachment attachment = new Attachment().setLink(link);
-      ModifyAttachmentsRequest modifyAttachmentsRequest = new ModifyAttachmentsRequest()
-          .setAddAttachments(Arrays.asList(attachment));
+      ModifyAttachmentsRequest modifyAttachmentsRequest =
+          new ModifyAttachmentsRequest().setAddAttachments(Arrays.asList(attachment));
 
       // The modified studentSubmission object is returned with the new attachment added to it.
-      studentSubmission = service.courses().courseWork().studentSubmissions().modifyAttachments(
-          courseId, courseWorkId, id, modifyAttachmentsRequest)
-          .execute();
+      studentSubmission =
+          service
+              .courses()
+              .courseWork()
+              .studentSubmissions()
+              .modifyAttachments(courseId, courseWorkId, id, modifyAttachmentsRequest)
+              .execute();
 
       /* Prints the modified student submission. */
-      System.out.printf("Modified student submission attachments: '%s'.\n", studentSubmission
-          .getAssignmentSubmission()
-          .getAttachments());
+      System.out.printf(
+          "Modified student submission attachments: '%s'.\n",
+          studentSubmission.getAssignmentSubmission().getAttachments());
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
-        System.out.printf("The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "
-            + "not exist.\n", courseId, courseWorkId, id);
+        System.out.printf(
+            "The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "
+                + "not exist.\n",
+            courseId, courseWorkId, id);
       } else {
         throw e;
       }
-    } catch(Exception e) {
+    } catch (Exception e) {
       throw e;
     }
     return studentSubmission;
@@ -100,4 +104,4 @@ public static StudentSubmission modifyAttachments(String courseId, String course
 
   }
 }
-// [END classroom_modify_attachments_student_submissions_class]
\ No newline at end of file
+// [END classroom_modify_attachments_student_submissions_class]
diff --git a/classroom/snippets/src/main/java/PatchCourse.java b/classroom/snippets/src/main/java/PatchCourse.java
index afd85ba1..05bc71ac 100644
--- a/classroom/snippets/src/main/java/PatchCourse.java
+++ b/classroom/snippets/src/main/java/PatchCourse.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_patch_course]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -33,7 +32,8 @@ public class PatchCourse {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
 
   /**
    * Updates one or more fields in a course.
@@ -49,20 +49,16 @@ public static Course patchCourse(String courseId) throws GeneralSecurityExceptio
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
     Course course = null;
     try {
-      course = new Course()
-          .setSection("Period 3")
-          .setRoom("302");
-      course = service.courses().patch(courseId, course)
-          .setUpdateMask("section,room")
-          .execute();
+      course = new Course().setSection("Period 3").setRoom("302");
+      course = service.courses().patch(courseId, course).setUpdateMask("section,room").execute();
       System.out.printf("Course '%s' updated.\n", course.getName());
     } catch (GoogleJsonResponseException e) {
       // TODO(developer) - handle error appropriately
@@ -76,4 +72,4 @@ public static Course patchCourse(String courseId) throws GeneralSecurityExceptio
     return course;
   }
 }
-// [END classroom_patch_course]
\ No newline at end of file
+// [END classroom_patch_course]
diff --git a/classroom/snippets/src/main/java/PatchStudentSubmission.java b/classroom/snippets/src/main/java/PatchStudentSubmission.java
index 7931179b..33ed5165 100644
--- a/classroom/snippets/src/main/java/PatchStudentSubmission.java
+++ b/classroom/snippets/src/main/java/PatchStudentSubmission.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_patch_student_submissions_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -32,9 +31,9 @@
 public class PatchStudentSubmission {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-    tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+  tokens/ folder. */
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
   /**
    * Updates the draft grade and/or assigned grade of a student submission.
    *
@@ -45,16 +44,17 @@ public class PatchStudentSubmission {
    * @throws IOException - if credentials file not found.
    * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static StudentSubmission patchStudentSubmission(String courseId, String courseWorkId,
-      String id) throws GeneralSecurityException, IOException {
+  public static StudentSubmission patchStudentSubmission(
+      String courseId, String courseWorkId, String id)
+      throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -63,28 +63,38 @@ public static StudentSubmission patchStudentSubmission(String courseId, String c
     StudentSubmission studentSubmission = null;
     try {
       // Updating the draftGrade and assignedGrade fields for the specific student submission.
-      StudentSubmission content = service.courses().courseWork().studentSubmissions()
-          .get(courseId, courseWorkId, id)
-          .execute();
+      StudentSubmission content =
+          service
+              .courses()
+              .courseWork()
+              .studentSubmissions()
+              .get(courseId, courseWorkId, id)
+              .execute();
       content.setAssignedGrade(90.00);
       content.setDraftGrade(80.00);
 
       // The updated studentSubmission object is returned with the new draftGrade and assignedGrade.
-      studentSubmission = service.courses().courseWork().studentSubmissions()
-          .patch(courseId, courseWorkId, id, content)
-          .set("updateMask", "draftGrade,assignedGrade")
-          .execute();
+      studentSubmission =
+          service
+              .courses()
+              .courseWork()
+              .studentSubmissions()
+              .patch(courseId, courseWorkId, id, content)
+              .set("updateMask", "draftGrade,assignedGrade")
+              .execute();
 
       /* Prints the updated student submission. */
-      System.out.printf("Updated student submission draft grade (%s) and assigned grade (%s).\n",
-          studentSubmission.getDraftGrade(),
-          studentSubmission.getAssignedGrade());
+      System.out.printf(
+          "Updated student submission draft grade (%s) and assigned grade (%s).\n",
+          studentSubmission.getDraftGrade(), studentSubmission.getAssignedGrade());
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
-        System.out.printf("The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "
-            + "not exist.\n", courseId, courseWorkId, id);
+        System.out.printf(
+            "The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "
+                + "not exist.\n",
+            courseId, courseWorkId, id);
       } else {
         throw e;
       }
@@ -97,4 +107,4 @@ public static StudentSubmission patchStudentSubmission(String courseId, String c
 
   }
 }
-// [END classroom_patch_student_submissions_class]
\ No newline at end of file
+// [END classroom_patch_student_submissions_class]
diff --git a/classroom/snippets/src/main/java/ReturnStudentSubmission.java b/classroom/snippets/src/main/java/ReturnStudentSubmission.java
index dcf8e7bd..61c891a0 100644
--- a/classroom/snippets/src/main/java/ReturnStudentSubmission.java
+++ b/classroom/snippets/src/main/java/ReturnStudentSubmission.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_return_student_submissions_class]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -32,10 +31,11 @@ public class ReturnStudentSubmission {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
   /**
-   * Return a student submission back to the student which updates the submission state to `RETURNED`.
+   * Return a student submission back to the student which updates the submission state to
+   * `RETURNED`.
    *
    * @param courseId - identifier of the course.
    * @param courseWorkId - identifier of the course work.
@@ -50,24 +50,29 @@ public static void returnSubmission(String courseId, String courseWorkId, String
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
     // [START classroom_return_student_submissions_code_snippet]
 
     try {
-      service.courses().courseWork().studentSubmissions()
+      service
+          .courses()
+          .courseWork()
+          .studentSubmissions()
           .classroomReturn(courseId, courseWorkId, id, null)
           .execute();
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
-        System.out.printf("The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "
-            + "not exist.\n", courseId, courseWorkId, id);
+        System.out.printf(
+            "The courseId (%s), courseWorkId (%s), or studentSubmissionId (%s) does "
+                + "not exist.\n",
+            courseId, courseWorkId, id);
       } else {
         throw e;
       }
diff --git a/classroom/snippets/src/main/java/UpdateCourse.java b/classroom/snippets/src/main/java/UpdateCourse.java
index 431640c7..fdfd6062 100644
--- a/classroom/snippets/src/main/java/UpdateCourse.java
+++ b/classroom/snippets/src/main/java/UpdateCourse.java
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-
 // [START classroom_update_course]
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
@@ -32,9 +31,9 @@
 public class UpdateCourse {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-    tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
+  tokens/ folder. */
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSES));
   /**
    * Updates a course's metadata.
    *
@@ -49,9 +48,9 @@ public static Course updateCourse(String courseId) throws GeneralSecurityExcepti
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -76,4 +75,4 @@ public static Course updateCourse(String courseId) throws GeneralSecurityExcepti
     return course;
   }
 }
-// [END classroom_update_course]
\ No newline at end of file
+// [END classroom_update_course]
diff --git a/classroom/snippets/src/main/java/UpdateTopic.java b/classroom/snippets/src/main/java/UpdateTopic.java
index 62546e22..e45c3cc8 100644
--- a/classroom/snippets/src/main/java/UpdateTopic.java
+++ b/classroom/snippets/src/main/java/UpdateTopic.java
@@ -32,8 +32,8 @@ public class UpdateTopic {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
 
   /**
    * Update one or more fields in a topic in a course.
@@ -50,9 +50,9 @@ public static Topic updateTopic(String courseId, String topicId)
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -67,10 +67,14 @@ public static Topic updateTopic(String courseId, String topicId)
       topicToUpdate.setName("Semester 2");
 
       /* Call the patch endpoint and set the updateMask query parameter to the field that needs to
-       be updated. */
-      topic = service.courses().topics().patch(courseId, topicId, topicToUpdate)
-          .set("updateMask", "name")
-          .execute();
+      be updated. */
+      topic =
+          service
+              .courses()
+              .topics()
+              .patch(courseId, topicId, topicToUpdate)
+              .set("updateMask", "name")
+              .execute();
 
       /* Prints the updated topic. */
       System.out.printf("Topic '%s' updated.\n", topic.getName());
diff --git a/classroom/snippets/src/test/java/BaseTest.java b/classroom/snippets/src/test/java/BaseTest.java
index d004570e..1b2eb04d 100644
--- a/classroom/snippets/src/test/java/BaseTest.java
+++ b/classroom/snippets/src/test/java/BaseTest.java
@@ -19,12 +19,11 @@
 import com.google.api.services.classroom.ClassroomScopes;
 import com.google.api.services.classroom.model.Course;
 import com.google.api.services.classroom.model.CourseAlias;
+import java.io.IOException;
 import java.security.GeneralSecurityException;
 import java.util.ArrayList;
-import org.junit.After;
-
-import java.io.IOException;
 import java.util.UUID;
+import org.junit.After;
 
 // Base class for integration tests.
 public class BaseTest {
diff --git a/classroom/snippets/src/test/java/TestAddStudent.java b/classroom/snippets/src/test/java/TestAddStudent.java
index 980ef941..2b185c9a 100644
--- a/classroom/snippets/src/test/java/TestAddStudent.java
+++ b/classroom/snippets/src/test/java/TestAddStudent.java
@@ -13,10 +13,10 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.Student;
+import java.io.IOException;
 import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
-import java.io.IOException;
 
 // Unit test class for Add Student classroom snippet
 public class TestAddStudent extends BaseTest {
diff --git a/classroom/snippets/src/test/java/TestAddTeacher.java b/classroom/snippets/src/test/java/TestAddTeacher.java
index 09c86a29..58eaae57 100644
--- a/classroom/snippets/src/test/java/TestAddTeacher.java
+++ b/classroom/snippets/src/test/java/TestAddTeacher.java
@@ -13,10 +13,10 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.Teacher;
+import java.io.IOException;
 import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
-import java.io.IOException;
 
 // Unit test class for Add Teacher classroom snippet
 public class TestAddTeacher extends BaseTest {
diff --git a/classroom/snippets/src/test/java/TestBatchAddStudents.java b/classroom/snippets/src/test/java/TestBatchAddStudents.java
index b185f28b..1f66874a 100644
--- a/classroom/snippets/src/test/java/TestBatchAddStudents.java
+++ b/classroom/snippets/src/test/java/TestBatchAddStudents.java
@@ -12,11 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import java.security.GeneralSecurityException;
-import org.junit.Test;
 import java.io.IOException;
+import java.security.GeneralSecurityException;
 import java.util.Arrays;
 import java.util.List;
+import org.junit.Test;
 
 // Unit test class for Batch Add Students classroom snippet
 public class TestBatchAddStudents extends BaseTest {
diff --git a/classroom/snippets/src/test/java/TestCreateCourse.java b/classroom/snippets/src/test/java/TestCreateCourse.java
index 5606b101..a251f15c 100644
--- a/classroom/snippets/src/test/java/TestCreateCourse.java
+++ b/classroom/snippets/src/test/java/TestCreateCourse.java
@@ -13,10 +13,10 @@
 // limitations under the License.
 
 import com.google.api.services.classroom.model.Course;
+import java.io.IOException;
 import java.security.GeneralSecurityException;
 import org.junit.Assert;
 import org.junit.Test;
-import java.io.IOException;
 
 // Unit test class for Create Course classroom snippet
 public class TestCreateCourse extends BaseTest {

From 051a3cc447ffb76548b82cb301da374e9fa7121e Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Thu, 9 Feb 2023 14:58:30 -0500
Subject: [PATCH 46/50] google java format DeleteTopic

---
 classroom/snippets/src/main/java/DeleteTopic.java | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/classroom/snippets/src/main/java/DeleteTopic.java b/classroom/snippets/src/main/java/DeleteTopic.java
index 9508db3f..15188de6 100644
--- a/classroom/snippets/src/main/java/DeleteTopic.java
+++ b/classroom/snippets/src/main/java/DeleteTopic.java
@@ -30,8 +30,8 @@ public class DeleteTopic {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_TOPICS));
 
   /**
    * Delete a topic in a course.
@@ -49,9 +49,9 @@ public static void deleteTopic(String courseId, String topicId)
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 

From c018e9dce0e08e509f89c8ab39ea3ffda4fcfaee Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 14 Feb 2023 15:43:04 -0500
Subject: [PATCH 47/50] added test cases to CreateInvitation and
 DeleteInvitation classes

---
 .../snippets/src/test/java/TestCreateInvitation.java |  9 +++++++++
 .../snippets/src/test/java/TestDeleteInvitation.java | 12 ++++++++++--
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/classroom/snippets/src/test/java/TestCreateInvitation.java b/classroom/snippets/src/test/java/TestCreateInvitation.java
index c6daeebc..13095342 100644
--- a/classroom/snippets/src/test/java/TestCreateInvitation.java
+++ b/classroom/snippets/src/test/java/TestCreateInvitation.java
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import com.google.api.client.googleapis.json.GoogleJsonResponseException;
 import com.google.api.services.classroom.model.Invitation;
 import java.io.IOException;
 import java.security.GeneralSecurityException;
@@ -31,4 +32,12 @@ public void testCreateInvitation() throws GeneralSecurityException, IOException
     Assert.assertEquals(invitation.getUserId(), userId);
   }
 
+  @Test
+  public void testCreateInvitationWithInvalidCourseId()
+      throws GeneralSecurityException, IOException {
+    setup(CreateInvitation.SCOPES);
+    Assert.assertThrows(
+        GoogleJsonResponseException.class,
+        () -> CreateInvitation.createInvitation("invalid-course-id", userId));
+  }
 }
diff --git a/classroom/snippets/src/test/java/TestDeleteInvitation.java b/classroom/snippets/src/test/java/TestDeleteInvitation.java
index 9d53a751..84448189 100644
--- a/classroom/snippets/src/test/java/TestDeleteInvitation.java
+++ b/classroom/snippets/src/test/java/TestDeleteInvitation.java
@@ -28,7 +28,15 @@ public void testDeleteInvitation() throws GeneralSecurityException, IOException
     setup(DeleteInvitation.SCOPES);
     Invitation invitation = CreateInvitation.createInvitation(testCourse.getId(), userId);
     DeleteInvitation.deleteInvitation(invitation.getId());
-    Assert.assertThrows(GoogleJsonResponseException.class,
-        () -> GetInvitation.getInvitation(invitation.getId()));
+    Assert.assertThrows(
+        GoogleJsonResponseException.class, () -> GetInvitation.getInvitation(invitation.getId()));
+  }
+
+  @Test
+  public void testDeleteInvitationWithInvalidId() throws GeneralSecurityException, IOException {
+    setup(DeleteInvitation.SCOPES);
+    Assert.assertThrows(
+        GoogleJsonResponseException.class,
+        () -> DeleteInvitation.deleteInvitation("invalid-invitation-id"));
   }
 }

From b2b3da4606b4c932a7ab21cfdd21d3287512d041 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 21 Feb 2023 13:10:17 -0500
Subject: [PATCH 48/50] additional comment in accept invitation test case

---
 .../snippets/src/test/java/TestAcceptInvitation.java   | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/classroom/snippets/src/test/java/TestAcceptInvitation.java b/classroom/snippets/src/test/java/TestAcceptInvitation.java
index d34c2d43..98a6fec3 100644
--- a/classroom/snippets/src/test/java/TestAcceptInvitation.java
+++ b/classroom/snippets/src/test/java/TestAcceptInvitation.java
@@ -25,13 +25,15 @@ public class TestAcceptInvitation {
   @Test
   public void testAcceptInvitation() throws GeneralSecurityException, IOException {
     AcceptInvitation.acceptInvitation(invitationId);
-    Assert.assertThrows(GoogleJsonResponseException.class,
-        () -> GetInvitation.getInvitation(invitationId));
+    /* Once an invitation is accepted, it is removed and the user is added to the course as a
+    teacher or a student. */
+    Assert.assertThrows(
+        GoogleJsonResponseException.class, () -> GetInvitation.getInvitation(invitationId));
   }
 
   @Test
   public void testAcceptInvitationWithInvalidId() {
-    Assert.assertThrows(GoogleJsonResponseException.class,
-        () -> AcceptInvitation.acceptInvitation("invalid-id"));
+    Assert.assertThrows(
+        GoogleJsonResponseException.class, () -> AcceptInvitation.acceptInvitation("invalid-id"));
   }
 }

From 32d289d4a7977720da70260a0306a0c9486eaf24 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Fri, 24 Feb 2023 12:47:49 -0500
Subject: [PATCH 49/50] fixing java formatting

---
 .../src/main/java/AcceptInvitation.java       | 12 ++++----
 .../src/main/java/CreateInvitation.java       | 28 +++++++++----------
 .../src/main/java/DeleteInvitation.java       | 12 ++++----
 .../snippets/src/main/java/GetInvitation.java | 15 +++++-----
 .../src/main/java/ListStudentSubmissions.java | 12 ++++----
 5 files changed, 40 insertions(+), 39 deletions(-)

diff --git a/classroom/snippets/src/main/java/AcceptInvitation.java b/classroom/snippets/src/main/java/AcceptInvitation.java
index 241a80c9..137a23a0 100644
--- a/classroom/snippets/src/main/java/AcceptInvitation.java
+++ b/classroom/snippets/src/main/java/AcceptInvitation.java
@@ -31,8 +31,8 @@ public class AcceptInvitation {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
 
   /**
    * Accepts an invitation to a course.
@@ -47,9 +47,9 @@ public static void acceptInvitation(String id) throws GeneralSecurityException,
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -69,4 +69,4 @@ public static void acceptInvitation(String id) throws GeneralSecurityException,
     // [END classroom_accept_invitation_code_snippet]
   }
 }
-// [END classroom_accept_invitation]
\ No newline at end of file
+// [END classroom_accept_invitation]
diff --git a/classroom/snippets/src/main/java/CreateInvitation.java b/classroom/snippets/src/main/java/CreateInvitation.java
index b6a01588..3e3d22ac 100644
--- a/classroom/snippets/src/main/java/CreateInvitation.java
+++ b/classroom/snippets/src/main/java/CreateInvitation.java
@@ -31,9 +31,9 @@
 public class CreateInvitation {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
-    tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+  tokens/ folder. */
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
 
   /**
    * Create an invitation to allow a user to join a course.
@@ -51,9 +51,9 @@ public static Invitation createInvitation(String courseId, String userId)
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -63,17 +63,16 @@ public static Invitation createInvitation(String courseId, String userId)
     try {
       /* Set the role the user is invited to have in the course. Possible values of CourseRole can be
       found here: https://developers.google.com/classroom/reference/rest/v1/invitations#courserole.*/
-      Invitation content = new Invitation()
-          .setCourseId(courseId)
-          .setUserId(userId)
-          .setRole("TEACHER");
+      Invitation content =
+          new Invitation().setCourseId(courseId).setUserId(userId).setRole("TEACHER");
 
       invitation = service.invitations().create(content).execute();
 
-      System.out.printf("User (%s) has been invited to course (%s).\n", invitation.getUserId(),
-          invitation.getCourseId());
+      System.out.printf(
+          "User (%s) has been invited to course (%s).\n",
+          invitation.getUserId(), invitation.getCourseId());
     } catch (GoogleJsonResponseException e) {
-      //TODO (developer) - handle error appropriately
+      // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf("The course or user does not exist.\n");
@@ -86,6 +85,5 @@ public static Invitation createInvitation(String courseId, String userId)
 
     // [END classroom_create_invitation_code_snippet]
   }
-
 }
-// [END classroom_create_invitation]
\ No newline at end of file
+// [END classroom_create_invitation]
diff --git a/classroom/snippets/src/main/java/DeleteInvitation.java b/classroom/snippets/src/main/java/DeleteInvitation.java
index d11fee03..eca59e92 100644
--- a/classroom/snippets/src/main/java/DeleteInvitation.java
+++ b/classroom/snippets/src/main/java/DeleteInvitation.java
@@ -31,8 +31,8 @@ public class DeleteInvitation {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
 
   /**
    * Deletes an invitation.
@@ -47,9 +47,9 @@ public static void deleteInvitation(String id) throws GeneralSecurityException,
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -69,4 +69,4 @@ public static void deleteInvitation(String id) throws GeneralSecurityException,
     // [END classroom_delete_invitation_code_snippet]
   }
 }
-// [END classroom_delete_invitation]
\ No newline at end of file
+// [END classroom_delete_invitation]
diff --git a/classroom/snippets/src/main/java/GetInvitation.java b/classroom/snippets/src/main/java/GetInvitation.java
index b689d851..77d0598f 100644
--- a/classroom/snippets/src/main/java/GetInvitation.java
+++ b/classroom/snippets/src/main/java/GetInvitation.java
@@ -31,8 +31,8 @@
 public class GetInvitation {
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(
-      Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_ROSTERS));
 
   /**
    * Retrieves an invitation.
@@ -47,9 +47,9 @@ public static Invitation getInvitation(String id) throws GeneralSecurityExceptio
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -57,7 +57,8 @@ public static Invitation getInvitation(String id) throws GeneralSecurityExceptio
     Invitation invitation = null;
     try {
       invitation = service.invitations().get(id).execute();
-      System.out.printf("Invitation (%s) for user (%s) in course (%s) retrieved.\n",
+      System.out.printf(
+          "Invitation (%s) for user (%s) in course (%s) retrieved.\n",
           invitation.getId(), invitation.getUserId(), invitation.getCourseId());
     } catch (GoogleJsonResponseException e) {
       GoogleJsonError error = e.getDetails();
@@ -72,4 +73,4 @@ public static Invitation getInvitation(String id) throws GeneralSecurityExceptio
     // [END classroom_get_invitation_code_snippet]
   }
 }
-// [END classroom_get_invitation]
\ No newline at end of file
+// [END classroom_get_invitation]
diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index a0d6dc9e..acd6598a 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -34,7 +34,8 @@ public class ListStudentSubmissions {
 
   /* Scopes required by this API call. If modifying these scopes, delete your previously saved
   tokens/ folder. */
-  static ArrayList<String> SCOPES = new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
+  static ArrayList<String> SCOPES =
+      new ArrayList<>(Arrays.asList(ClassroomScopes.CLASSROOM_COURSEWORK_STUDENTS));
 
   /**
    * Retrieves a specific student's submissions for the specified course work.
@@ -46,16 +47,17 @@ public class ListStudentSubmissions {
    * @throws IOException - if credentials file not found.
    * @throws GeneralSecurityException - if a new instance of NetHttpTransport was not created.
    */
-  public static List<StudentSubmission> listStudentSubmissions(String courseId, String courseWorkId, String userId)
+  public static List<StudentSubmission> listStudentSubmissions(
+      String courseId, String courseWorkId, String userId)
       throws GeneralSecurityException, IOException {
 
     // Create the classroom API client.
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 

From d07fdd218388fffb32c83b4491e8178331276f48 Mon Sep 17 00:00:00 2001
From: Mahima Desetty <mahimadesetty@google.com>
Date: Tue, 28 Feb 2023 11:38:54 -0500
Subject: [PATCH 50/50] google java format fix

---
 .../src/main/java/ListStudentSubmissions.java | 21 +++++++++----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/classroom/snippets/src/main/java/ListStudentSubmissions.java b/classroom/snippets/src/main/java/ListStudentSubmissions.java
index fb2ddcef..20e322a1 100644
--- a/classroom/snippets/src/main/java/ListStudentSubmissions.java
+++ b/classroom/snippets/src/main/java/ListStudentSubmissions.java
@@ -62,7 +62,6 @@ public static List<StudentSubmission> listStudentSubmissions(
             .build();
 
     // [START classroom_list_student_submissions_code_snippet]
-
     List<StudentSubmission> studentSubmissions = new ArrayList<>();
     String pageToken = null;
 
@@ -93,6 +92,7 @@ public static List<StudentSubmission> listStudentSubmissions(
           System.out.printf("Student submission: %s.\n", submission.getId());
         }
       }
+      // [END classroom_list_student_submissions_code_snippet]
     } catch (GoogleJsonResponseException e) {
       // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
@@ -107,7 +107,6 @@ public static List<StudentSubmission> listStudentSubmissions(
       throw e;
     }
     return studentSubmissions;
-    // [END classroom_list_student_submissions_code_snippet]
   }
 
   /**
@@ -125,9 +124,9 @@ public static void listAssignedGrades(String courseId, String courseWorkId)
     final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
     Classroom service =
         new Classroom.Builder(
-            HTTP_TRANSPORT,
-            GsonFactory.getDefaultInstance(),
-            ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
+                HTTP_TRANSPORT,
+                GsonFactory.getDefaultInstance(),
+                ClassroomCredentials.getCredentials(HTTP_TRANSPORT, SCOPES))
             .setApplicationName("Classroom samples")
             .build();
 
@@ -136,7 +135,7 @@ public static void listAssignedGrades(String courseId, String courseWorkId)
 
     try {
       do {
-    // [START classroom_list_assigned_grades_code_snippet]
+        // [START classroom_list_assigned_grades_code_snippet]
         ListStudentSubmissionsResponse response =
             service
                 .courses()
@@ -157,18 +156,18 @@ public static void listAssignedGrades(String courseId, String courseWorkId)
         System.out.println("No student submissions found.");
       } else {
         for (StudentSubmission submission : studentSubmissions) {
-          System.out.printf("User ID %s, Assigned grade: %s\n", submission.getUserId(),
-              submission.getAssignedGrade());
+          System.out.printf(
+              "User ID %s, Assigned grade: %s\n",
+              submission.getUserId(), submission.getAssignedGrade());
         }
       }
-    // [END classroom_list_assigned_grades_code_snippet]
+      // [END classroom_list_assigned_grades_code_snippet]
     } catch (GoogleJsonResponseException e) {
       // TODO (developer) - handle error appropriately
       GoogleJsonError error = e.getDetails();
       if (error.getCode() == 404) {
         System.out.printf(
-            "The courseId (%s) or courseWorkId (%s) does not exist.\n",
-            courseId, courseWorkId);
+            "The courseId (%s) or courseWorkId (%s) does not exist.\n", courseId, courseWorkId);
       } else {
         throw e;
       }