public class ButtonDemoLambda extends Application
1: import javafx.application.Application;
2: import javafx.scene.Scene;
3: import javafx.stage.Stage;
4: import javafx.scene.layout.VBox;
5: import javafx.scene.control.Button;
6: import javafx.event.ActionEvent;
7: import javafx.event.EventHandler;
8: import javafx.scene.control.Label;
9:
10: /**
11: Event handling with lambda functions.
12: */
13: public class ButtonDemoLambda extends Application
14: {
15: public static void main(String[] args)
16: {
17: launch(args);
18: }
19:
20: @Override
21: public void start(Stage primaryStage) throws Exception
22: {
23: VBox root = new VBox();
24: Button btnSunny;
25: Button btnCloudy;
26: Label lblMessage;
27: btnSunny = new Button("Sunny");
28: btnCloudy = new Button("Cloudy");
29: lblMessage = new Label("Click a button.");
30:
31: btnSunny.setOnAction(e ->
32: {
33: lblMessage.setText("It is sunny!");
34: }
35: );
36: btnCloudy.setOnAction(e ->
37: {
38: lblMessage.setText("It is cloudy!");
39: }
40: );
41:
42: root.getChildren().add(btnSunny);
43: root.getChildren().add(btnCloudy);
44: root.getChildren().add(lblMessage);
45:
46: Scene scene = new Scene(root, 300, 100);
47: primaryStage.setTitle("Lambda Button Demo");
48: primaryStage.setScene(scene);
49: primaryStage.show();
50: }
51: }