FunctionalMap.java

// collectiontopics/FunctionalMap.java
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Functional operations on a Map
import java.util.*;
import java.util.stream.*;
import java.util.concurrent.*;
import static onjava.HTMLColors.*;

public class FunctionalMap {
  public static void main(String[] args) {
    MAP.entrySet().stream()
      .map(Map.Entry::getValue)
      .filter(v -> v.startsWith("Dark"))
      .map(v -> v.replaceFirst("Dark", "Hot"))
      .forEach(System.out::println);
  }
}
/* Output:
HotBlue
HotCyan
HotGoldenRod
HotGray
HotGreen
HotKhaki
HotMagenta
HotOliveGreen
HotOrange
HotOrchid
HotRed
HotSalmon
HotSeaGreen
HotSlateBlue
HotSlateGray
HotTurquoise
HotViolet
*/