Why do the menus disappear?

Question

I am quite new to Java and I use project builder on my mac running OSX. Anyway I found some sample code and I was wondering if anybody could help me out. Basically when the app is compiled it draws "Hello World" in the window and there are two menus in the menubar -> 'File' and 'Edit', but when you go to the about box the menus disappear until you either close the aboutbox or bring the focus back to the main window.
How can I always keep the menus showing when there are multiple windows in the app. Remember that mac menus are fixed to the top of the screen...
anyway heres the code:
import java.awt.*;
import java.awt.event.*;
import com.apple.mrj.*;
import javax.swing.*;
public class test extends JFrame
                      implements  ActionListener,
                                  MRJAboutHandler,
                                  MRJQuitHandler
    static final String message = "Hello World!";
    private Font font = new Font("serif", Font.ITALIC+Font.BOLD, 36);
    protected AboutBox aboutBox;
    // Declarations for menus
    static final JMenuBar mainMenuBar = new JMenuBar();
    static final JMenu fileMenu = new JMenu("File");
    protected JMenuItem miNew;
    protected JMenuItem miOpen;
    protected JMenuItem miClose;
    protected JMenuItem miSave;
    protected JMenuItem miSaveAs;
    static final JMenu editMenu = new JMenu("Edit");
    protected JMenuItem miUndo;
    protected JMenuItem miCut;
    protected JMenuItem miCopy;
    protected JMenuItem miPaste;
    protected JMenuItem miClear;
    protected JMenuItem miSelectAll;
    public void addFileMenuItems() {
        miNew = new JMenuItem ("New");
        miNew.setAccelerator(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_N, java.awt.Event.META_MASK));
        fileMenu.add(miNew).setEnabled(true);
        miNew.addActionListener(this);
        miOpen = new JMenuItem ("Open...");
        miOpen.setAccelerator(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_O, java.awt.Event.META_MASK));
        fileMenu.add(miOpen).setEnabled(true);
        miOpen.addActionListener(this);
        miClose = new JMenuItem ("Close");
        miClose.setAccelerator(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_W, java.awt.Event.META_MASK));
        fileMenu.add(miClose).setEnabled(true);
        miClose.addActionListener(this);
        miSave = new JMenuItem ("Save");
        miSave.setAccelerator(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_S, java.awt.Event.META_MASK));
        fileMenu.add(miSave).setEnabled(true);
        miSave.addActionListener(this);
        miSaveAs = new JMenuItem ("Save As...");
        fileMenu.add(miSaveAs).setEnabled(true);
        miSaveAs.addActionListener(this);
        mainMenuBar.add(fileMenu);
    public void addEditMenuItems() {
        miUndo = new JMenuItem("Undo");
        miUndo.setAccelerator(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_Z, java.awt.Event.META_MASK));
        editMenu.add(miUndo).setEnabled(true);
        miUndo.addActionListener(this);
        editMenu.addSeparator();
        miCut = new JMenuItem("Cut");
        miCut.setAccelerator(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_X, java.awt.Event.META_MASK));
        editMenu.add(miCut).setEnabled(true);
        miCut.addActionListener(this);
        miCopy = new JMenuItem("Copy");
        miCopy.setAccelerator(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_C, java.awt.Event.META_MASK));
        editMenu.add(miCopy).setEnabled(true);
        miCopy.addActionListener(this);
        miPaste = new JMenuItem("Paste");
        miPaste.setAccelerator(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_V, java.awt.Event.META_MASK));
        editMenu.add(miPaste).setEnabled(true);
        miPaste.addActionListener(this);
        miClear = new JMenuItem("Clear");
        editMenu.add(miClear).setEnabled(true);
        miClear.addActionListener(this);
        editMenu.addSeparator();
        miSelectAll = new JMenuItem("Select All");
        miSelectAll.setAccelerator(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_A, java.awt.Event.META_MASK));
        editMenu.add(miSelectAll).setEnabled(true);
        miSelectAll.addActionListener(this);
        mainMenuBar.add(editMenu);
    public void addMenus() {
        addFileMenuItems();
        addEditMenuItems();
        setJMenuBar (mainMenuBar);
    public test() {
        super("test");
        this.getContentPane().setLayout(null);
        addMenus();
        aboutBox = new AboutBox();
        Toolkit.getDefaultToolkit();
        MRJApplicationUtils.registerAboutHandler(this);
        MRJApplicationUtils.registerQuitHandler(this);
        setVisible(true);
    public void paint(Graphics g) {
          super.paint(g);
        g.setColor(Color.blue);
        g.setFont (font);
        g.drawString(message, 40, 80);
    public void handleAbout() {
        aboutBox.setResizable(false);
        aboutBox.setVisible(true);
        aboutBox.show();
    public void handleQuit() {     
        System.exit(0);
    // ActionListener interface (for menus)
    public void actionPerformed(ActionEvent newEvent) {
        if (newEvent.getActionCommand().equals(miNew.getActionCommand())) doNew();
        else if (newEvent.getActionCommand().equals(miOpen.getActionCommand())) doOpen();
        else if (newEvent.getActionCommand().equals(miClose.getActionCommand())) doClose();
        else if (newEvent.getActionCommand().equals(miSave.getActionCommand())) doSave();
        else if (newEvent.getActionCommand().equals(miSaveAs.getActionCommand())) doSaveAs();
        else if (newEvent.getActionCommand().equals(miUndo.getActionCommand())) doUndo();
        else if (newEvent.getActionCommand().equals(miCut.getActionCommand())) doCut();
        else if (newEvent.getActionCommand().equals(miCopy.getActionCommand())) doCopy();
        else if (newEvent.getActionCommand().equals(miPaste.getActionCommand())) doPaste();
        else if (newEvent.getActionCommand().equals(miClear.getActionCommand())) doClear();
        else if (newEvent.getActionCommand().equals(miSelectAll.getActionCommand())) doSelectAll();
    public void doNew() {}
    public void doOpen() {}
    public void doClose() {}
    public void doSave() {}
    public void doSaveAs() {}
    public void doUndo() {}
    public void doCut() {}
    public void doCopy() {}
    public void doPaste() {}
    public void doClear() {}
    public void doSelectAll() {}
    public static void main(String args[]) {
        new test();
}������������������������������������������
and the coe of the aboutbox
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//     File:     AboutBox.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class AboutBox extends JFrame
                      implements ActionListener
    protected JButton okButton;
    protected JLabel aboutText;
    public AboutBox() {
     super();
        this.getContentPane().setLayout(new BorderLayout(15, 15));
        this.setFont(new Font ("SansSerif", Font.BOLD, 14));
        aboutText = new JLabel ("About test");
        JPanel textPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 15, 15));
        textPanel.add(aboutText);
        this.getContentPane().add (textPanel, BorderLayout.NORTH);
        okButton = new JButton("OK");
        JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 15, 15));
        buttonPanel.add (okButton);
        okButton.addActionListener(this);
        this.getContentPane().add(buttonPanel, BorderLayout.SOUTH);
        this.pack();
    public void actionPerformed(ActionEvent newEvent) {
        setVisible(false);
}thanks

Answer 1

please anyone wanna help me?