30. Keys

The method setOnKeyPressed on the scene is used to listen for key presses.

The key code is printed in the label.

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package ex30;

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.stage.Stage;

public class Ex30 extends Application {

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

    @Override
    public void start(Stage primaryStage) throws Exception {
        Group root = new Group();
        Label label = new Label("  Press a key");
        label.setFont(new Font("Georgia", 32));
        root.getChildren().add(label);
        Scene scene = new Scene(root, 500, 200, Color.GAINSBORO);
        
        scene.setOnKeyPressed(e -> 
                label.setText("  Key Pressed: " +
                e.getCode().toString()));
        
        primaryStage.setScene(scene);
        primaryStage.setTitle("Example 30. Keys");
        primaryStage.show();
    
    }
}

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This is the output after a semicolon is pressed:

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