Compile the following program and follow the instructions in comments how to reproduce the bug.

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import java.awt.*;
import java.awt.event.*;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JMenuBar;

/*
 * Test class to show problem removing then adding a menu to a JMenuBar.
 * The problem only occurs when *not* running with
useScreenMenuBar="true"
*
* To reproduce:
* 1. Compile with "javac R3289768.java"
* 2. Run with "java -cp . R3289768"
* 3. Open the menu in the Frame. You should see one menu item. Click
the
* button, and then open the menu again. The menu doesn't open the
second
* time.
* 4. Quit and run again, this time using
apple.laf.useScreenMenuBar="true".
* Open the menu; it works. Press the button, and open the menu
again.
* It works correctly.
*
* @author Steve Magoun (###@###.###)
*/
public class R3289768 extends JFrame
    implements ActionListener {
    JMenuBar menuBar;

    public R3289768() {
        JButton button = new JButton("Click me to refresh menus");
        button.addActionListener(this);
        getContentPane().add(button);

        menuBar = new JMenuBar();
        menuBar.add(getMenu());
        setJMenuBar(menuBar);
    }

    public void actionPerformed(ActionEvent e) {
        menuBar.removeAll();
        menuBar.add(getMenu());
        // Uncomment this line for proper behavior when *not*
        // using apple.laf.useScreenMenuBar="true"
        // setJMenuBar(menuBar);
    }

    protected JMenu getMenu() {
        JMenu menu = new JMenu("A Menu");
        JMenuItem menuItem = new JMenuItem("A menu item");
        menu.add(menuItem);
        return menu;
    }

    public static void main(String[] args) {
        R3289768 window = new R3289768();

        window.setTitle("R3289768");
        window.setSize(450, 260);
        window.setVisible(true);
    }
}
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