// This code example is created for educational purpose
// by Thorsten Thormaehlen (contact: www.thormae.de).
// It is distributed without any warranty.

import javax.swing.*;

class MyGui extends JFrame {
  public void createGUI() {
    setTitle("HelloGUI");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(320, 240);
    JLabel label = new JLabel("Hello World");
    getContentPane().add(label);

    JMenuBar menuBar = new JMenuBar();
    JMenu menu = new JMenu("File");
    menuBar.add(menu);
    JMenuItem item = new JMenuItem("Open");
    menu.add(item);
    setJMenuBar(menuBar);

    setVisible(true);
  }
}

public class MyMenuBar {
  public static void main(String[] args) {
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        MyGui myGUI = new MyGui();
        myGUI.createGUI();
      }
    });
  }
}