JDK Version: 1.2beta4-F
Locale: zh
OS: Solaris

When JMenu's List be larger than the JFrame, and you popup the menu twice, the
second time, the menu has a refresh problem.
Following is a program to reproduce it.

===========================CheckJMenu.java====================================
import java.awt.swing.*;
import java.awt.swing.border.*;
import java.awt.*;
import java.util.*;
import java.io.*;

public class CheckJMenu extends JScrollPane {
    JMenuBar mainBar;
    JGeneralMenu myMenu1;

    public static void main(String args[]) {
JFrame f = new JFrame("JMenu Panel");
f.getContentPane().setLayout(new BorderLayout());
f.getContentPane().add(new CheckJMenu(), BorderLayout.CENTER);
f.pack();
f.show();
    }

    public CheckJMenu() {
        JPanel p = new JPanel();
p.setLayout(new BoxLayout(p, BoxLayout.Y_AXIS));
Font boldFont = new Font("Dialog", Font.BOLD, 12);
p.setBorder(new EmptyBorder(10, 10, 10, 10));

JLabel label = new JLabel("Menus:");
label.setAlignmentX(LEFT_ALIGNMENT);
label.setAlignmentY(TOP_ALIGNMENT);
p.add(label);
p.add(Box.createRigidArea(new Dimension(1, 40)));
mainBar = new JMenuBar();
//mainBar.setAlignmentX(LEFT_ALIGNMENT);
mainBar.setAlignmentY(TOP_ALIGNMENT);
label.setLabelFor(mainBar);

myMenu1 = new JGeneralMenu("General Menu");

mainBar.add(myMenu1);

p.add(mainBar);
getViewport().add(p);


    }

}
==============================================================================

==========================JGeneralMenu.java===================================

import java.awt.swing.*;
import java.awt.*;
import java.util.*;

public class JGeneralMenu extends JMenu {
    JMenuItem myJMenuItem1;
    JMenuItem myJMenuItem2;
    JMenuItem myJMenuItem3;
    JMenuItem myJMenuItem4;
    int itemCount = 4;

    public JGeneralMenu(String name) {
super(name);
myJMenuItem1 = new JMenuItem("General Menu Item 1");
myJMenuItem2 = new JMenuItem("General Menu Item 2");
myJMenuItem3 = new JMenuItem("General Menu Item 3");
myJMenuItem4 = new JMenuItem("General Menu Item 4");

add(myJMenuItem1);
add(myJMenuItem2);
add(myJMenuItem3);
add(myJMenuItem4);

    }

}

=============================================================================
save these two files.
javac CheckJMenu.java
java CheckJMenu
use mouse to popup the menu twice
the second time, the menu items can not be shown.



jim.hu@prc 1998-05-19