public MyGUI()
    {
        JMenuBar menubar = new JMenuBar(); // create menu bar
        ...
        JMenu help = new JMenu("Help");  // create help menu
        JMenuItem about = new JMenuItem("About MyGUI");  // create help menu item
        help.add(about);  // add that item to the menu
        ...
        menubar.add(help);  // add the help menu to the menubar
        ...
        // set the action listener to call the method aboutMyGUI()
        about.addActionListener(new ActionListener() {
                                public void actionPerformed(ActionEvent e) {
                                    aboutMyGUI();
                                } });
        ...
    }


    /**
     * Displays a pop-up dialog with information about my GUI.
     */
    private void aboutMyGUI()
    {
        final String title   = "About GUI Tool";
        final String message = "Tool Version 1.0\n\n" +
                               "For support, contact: LinuxQuestions.org";

        SwingUtilities.invokeLater(new Runnable()
        {
            @Override
            public void run()
            {
                JOptionPane.showMessageDialog(null, message, title, JOptionPane.INFORMATION_MESSAGE);
            }
        });
    }