import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class MnemonicsTest extends Application {

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

    VBox root = new VBox();

    @Override
    public void start(final Stage stage) throws Exception {
        VBox mainLayout = new VBox();

        MenuBar menuBar = new MenuBar();
        Menu menu1 = new Menu("_Menu");
        menu1.setMnemonicParsing(true);
        menu1.getItems().addAll(createMenuItem("Menu 1"), createMenuItem("Menu 2"));

        Menu menu2 = new Menu("_Other");
        menu2.setMnemonicParsing(true);
        menu2.getItems().addAll(createMenuItem("Other 1"), createMenuItem("Other 2"));

        menuBar.getMenus().setAll(menu1, menu2);

        mainLayout.getChildren().setAll(menuBar);

        Label label = new Label("_Label");
        label.setMnemonicParsing(true);
        Button button = new Button("Button");
        EventHandler<ActionEvent> eventHandler = new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent actionEvent) {
                System.out.println(actionEvent.getSource() + " fired");
            }
        };
        button.setOnAction(eventHandler);

        final Label labelX = new Label("_XLabel");
        labelX.setMnemonicParsing(true);

        final Button buttonX = new Button("Button X");
        buttonX.setOnAction(eventHandler);

        Button setLabelFor = new Button("Set label X for button X");
        setLabelFor.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent actionEvent) {
                labelX.setLabelFor(buttonX);
            }
        });

        label.setLabelFor(button);
        mainLayout.getChildren().add(label);
        mainLayout.getChildren().add(button);

        HBox containerX = new HBox(4);
        containerX.getChildren().addAll(labelX, buttonX, setLabelFor);
        mainLayout.getChildren().add(containerX);

        Scene scene = new Scene(mainLayout, 300, 100);

        stage.setTitle("Demo of mnemonic");
        stage.setScene(scene);
        stage.sizeToScene();
        stage.show();
    }

    private MenuItem createMenuItem(String s) {
        return new MenuItem(s);
    }
}