Swing setRolloverIcon/setWhateverIcon not working

Question

I've got a test program here to see if various Icon states actually work in Swing.
Under windows, the only icon state that seems to work is setIcon()...
Anyone know what I am doing wrong?
Here is the code:
package unittest;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.ImageIcon;
public class MenuTest2
     extends JFrame
     public MenuTest2 () {
          addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) {
               System.exit(0);
          JMenuBar menuBar = new JMenuBar();
          JMenu menu = new JMenu("A Menu");
          menuBar.add(menu);
          JMenuItem menuItem = new JMenuItem("A text-only menu item");
          menuItem.setIcon(new ImageIcon("test.gif"));
          menuItem.setRolloverIcon(new ImageIcon("test1.gif"));
          menuItem.setPressedIcon(new ImageIcon("test1.gif"));
          menu.add(menuItem);
          setJMenuBar(menuBar);
     public static void main(String[] args) {
MenuTest2 window = new MenuTest2();
window.setTitle("MenuTest");
     window.setSize(300, 200);
          window.setVisible(true);
}

Answer 1

cont = new JButton(new ImageIcon("normal.gif"));
cont.setPressedIcon(new ImageIcon("pressed.gif"));
cont.setRolloverIcon(new ImageIcon("roll.gif"));
cont.setFocusPainted(false);
cont.setBorderPainted(false);
cont.setContentAreaFilled(false);
cont.setMargin(new Insets(0,0,0,0));
this works
guaranteed :)