JavaFX Event Handler Example

import javafx.application.Application;
import javafx.application.Platform;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.MenuItem;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class EventHandlerEx extends Application {

    public void start(Stage stage) {

        initUI(stage);
    }

    private void initUI(Stage stage) {

        HBox root = new HBox();

        ContextMenu conMenu = new ContextMenu();
        MenuItem noopMi = new MenuItem("No op");
        MenuItem exitMi = new MenuItem("Exit");
        conMenu.getItems().addAll(noopMi, exitMi);
      
        exitMi.setOnAction(new EventHandler<ActionEvent>() {
      
            public void handle(ActionEvent event) {
                Platform.exit();
            }
        });
      
        root.setOnMousePressed(new EventHandler<MouseEvent>() {
 
            public void handle(MouseEvent event) {
                if (event.isSecondaryButtonDown()) {
                    conMenu.show(root, event.getScreenX(),
                            event.getScreenY());
                }
            }
        });      

        Scene scene = new Scene(root, 300, 250);

        stage.setTitle("EventHandler");
        stage.setScene(scene);
        stage.show();
    }

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