import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import javafx.stage.StageStyle;

public class MenuBarTest extends Application {

	@Override
	public void start(Stage pStage) throws Exception {
		pStage.initStyle(StageStyle.UNDECORATED);
		pStage.setTitle("MenuBar-Test");

		BorderPane root = new BorderPane();
		root.setStyle("-fx-border-color: black");

		MenuBar menuBar = new MenuBar();
		Menu file = new Menu("File");
		MenuItem quit = new MenuItem("Quit");
		file.getItems().add(quit);
		menuBar.getMenus().add(file);

		// just change Center & Top and everything will work fine
		root.setCenter(menuBar);
		root.setTop(new Label("Test"));

		pStage.setScene(new Scene(root, 250, 250));

		pStage.show();
	}

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

}