Wierd painting behaviour with menus and cardlayout

Question

I am using a menu to select a panel in a card layout. What happens is that objects on the panels in the card layout do not get drawn in the right place. For example clicking on an item in a table highlights the item but the highlighted item gets drawn outside of the table area (up and left by a few pixels). Similarly a combo box on one of the panels is drawn out of place by a few pixels when another window on the display comes to the top.
Has anyone experienced this before?
public class MyProgram extends JFrame {
* Entry point - create an application window
public static void main(String args[]){
     JFrame frame = new JFrame("MyProgram");
     ContentFrame a = new ContentFrame(frame,args);
     JMenuBar mainBar = a.getMainMenu();
     frame.getContentPane().setLayout(new FlowLayout());
     frame.setJMenuBar(mainBar);
     frame.getContentPane().add(a);
     frame.setDefaultCloseOperation(3);
     frame.pack();
     frame.setVisible(true);
ContentFrame extends JPanel {
ContentFrame () {
JScrollPane sp = new JScrollPane(new CardFrame());
setLayout BorderLayout()
add(sp, CENTER}
CardFrame extends JPanel {
CardFrame() {
JPanel cards = new Jpanel();
setLayout(new BorderLayout());
cards = new HJPanel();
cards.setLayout(new CardLayout());
addSomeJPanelsToCards();
add(cards,BorderLayout.CENTER);

Answer 1

1. Some of your code is missing
2. It's not a good idea to extend every class unless you need to add some functionality which doesn't exist in the class you are extending. You aren't doing that. Here's a better way to code it.import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test extends JFrame {
    String[] cardNames = {"Card One", "Card Two", "Another Card",
               "Yet Another", "Final Card"};
    CardLayout clo = new CardLayout();  // accessed from inner class
    JPanel cardPanel = new JPanel(clo);
    public Test() {
     super("MyProgram");
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     Container content = getContentPane();
     content.add(cardPanel, BorderLayout.CENTER);
     JMenuBar jmb = new JMenuBar();
     setJMenuBar(jmb);
     JMenu jm = new JMenu("Pick Card");
     jmb.add(jm);
     for (int i=0; i<cardNames.length; i++) {
         JPanel card = new JPanel();
         final String cardName = cardNames;
     card.add(new JLabel("Card Label("+cardName+")"));
     cardPanel.add(cardName,card);
     JMenuItem jmi = new JMenuItem(cardName);
     jm.add(jmi);
     jmi.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent ae) {
          clo.show(cardPanel,cardName);
     setSize(300,200);
     show();
public static void main(String[] args) { new Test(); }
}This is just a sample because I don't know what you are doing. Try running it before you tell me its not exactly what you wanted.