Java-Buddy

The following code replace traditional EventHandler with Lambda Expression in GUI application, JavaFX:

package javafx8_hello;
import javafx.application.Application;
import javafx.event.ActionEvent;
//import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
/**
 *
 * @web http://java-buddy.blogspot.com/
 */
public class JavaFX8_Hello extends Application {
 
 @Override
 public void start(Stage primaryStage) {
 Button btn = new Button();
 btn.setText("Say 'Hello World'");
 
 /* Normal 
 btn.setOnAction(new EventHandler<ActionEvent>() {
 
 @Override
 public void handle(ActionEvent event) {
 System.out.println("Hello World!");
 }
 });
 */
 
 /*
 In Lambda Expression
 */
 btn.setOnAction((ActionEvent event) -> {
 System.out.println("Hello World!");
 });
 
 StackPane root = new StackPane();
 root.getChildren().add(btn);
 
 Scene scene = new Scene(root, 300, 250);
 
 primaryStage.setTitle("Hello World!");
 primaryStage.setScene(scene);
 primaryStage.show();
 }
 public static void main(String[] args) {
 launch(args);
 }
 
}

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