import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class Main extends Application {

    Stage window;
    Scene scene;
    Button button;

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        window = primaryStage;
        window.setTitle("thenewboston");

        //Form
        TextField ageInput = new TextField();

        button = new Button("Click me");
        button.setOnAction( e -> isInt(ageInput, ageInput.getText()) );

        //Layout
        VBox layout = new VBox(10);
        layout.setPadding(new Insets(20, 20, 20, 20));
        layout.getChildren().addAll(ageInput, button);

        scene = new Scene(layout, 300, 250);
        window.setScene(scene);
        window.show();
    }

    //Validate age
    private boolean isInt(TextField input, String message){
        try{
            int age = Integer.parseInt(input.getText());
            System.out.println("User is: " + age);
            return true;
        }catch(NumberFormatException e){
            System.out.println("Error: " + message + " is not a number");
            return false;
        }
    }


}