import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.stage.Stage;

/**
 *
 * @author lans
 */
public class LongMenuFail extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {
        Scene scene;
        Menu fileMenu;
        Menu editMenu;
        MenuBar menuBar = new MenuBar();
        fileMenu = new Menu("LongMenu");
        menuBar.getMenus().clear();
        menuBar.getMenus().addAll(fileMenu);
        for (int i = 1; i <= 50; i++) {
            MenuItem menuitem = new MenuItem();
            menuitem.setText("MenuItem-" + i);
            fileMenu.getItems().add(menuitem);
        }
        Group group = new Group(menuBar);
        scene = new Scene(group, 400, 400);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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