JavaFX 8 ImageView, and detect MouseEvent

package javafx8image;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/**
 *
 * @web http://java-buddy.blogspot.com/
 */
public class JavaFX8Image extends Application {
    
    @Override
    public void start(Stage primaryStage) {
        
        ImageView imageView = new ImageView();
        
        imageView.setOnMouseClicked(new EventHandler<MouseEvent>(){

            @Override
            public void handle(MouseEvent event) {
                imageView.setImage(null);
            }
        });

        Button btn = new Button();
        btn.setText("Load image");
        btn.setOnAction(new EventHandler<ActionEvent>() {
            
            @Override
            public void handle(ActionEvent event) {
                imageView.setImage(new Image("http://goo.gl/kYEQl"));
            }
        });
        
        StackPane root = new StackPane();
        root.getChildren().addAll(btn, imageView);
        
        Scene scene = new Scene(root, 300, 250);
        
        primaryStage.setTitle("java-buddy.blogspot.com");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

Use Lambda expression

package javafx8imagelambda;

import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.event.ActionEvent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/**
 *
 * @web http://java-buddy.blogspot.com/
 */
public class JavaFX8ImageLambda extends Application {
    
    @Override
    public void start(Stage primaryStage) {
        
        ImageView imageView = new ImageView();
        
        //use Lambda expression
        imageView.setOnMouseClicked((MouseEvent event) -> {
            imageView.setImage(null);
        });

        Button btn = new Button();
        btn.setText("Load image");
        
        //use Lambda expression
        btn.setOnAction((ActionEvent event) -> {
            imageView.setImage(new Image("http://goo.gl/kYEQl"));
        });
        
        StackPane root = new StackPane();
        root.getChildren().addAll(btn, imageView);
        
        Scene scene = new Scene(root, 300, 250);
        
        primaryStage.setTitle("java-buddy.blogspot.com");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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