FULL PRODUCT VERSION :
java version "1.6.0_17"
Java(TM) SE Runtime Environment (build 1.6.0_17-b04)
Java HotSpot(TM) Client VM (build 14.3-b01, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Windows 7 Ultimate

A DESCRIPTION OF THE PROBLEM :
on a JMenuBar or JPopupMenu the highlighted item, if corresponds to a JMenu is overlaping its subsequent popup area. It happens just if the root JMenu is entirely contained by the JFrame client area. In the case a JMenu draws beyond the JFrame bounds the correspond submenu (JMenu) is not being overlaped by the caller highlighted item.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
class Form extends JFrame {
    public JFrame() {
		JMenuBar jmenubar = new JMenuBar();
		this.getContentPane().add(jmenubar);
		JMenu menu = new JMenu("menu");
		jmenubar.add(menu);
		JMenu submenu1 = new JMenu("level 1");
		menu.add(submenu1);

		JMenuItem item = new JMenuItem("item");
		submenu1.add(item);
                this.setSize(200,100);
               // rover to "item" and try the same with  this.setSize(200,60);
    }

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
caller menu item highlight being overlaped by child submenu
ACTUAL -
menu item highlight overlaping a child submenu

ERROR MESSAGES/STACK TRACES THAT OCCUR :
no error message

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
class Form extends JFrame {
    public JFrame() {
		JMenuBar jmenubar = new JMenuBar();
		this.getContentPane().add(jmenubar);
		JMenu menu = new JMenu("menu");
		jmenubar.add(menu);
		JMenu submenu1 = new JMenu("level 1");
		menu.add(submenu1);

		JMenuItem item = new JMenuItem("item");
		submenu1.add(item);
                this.setSize(200,100);
               // rover to "item" and try the same with  this.setSize(200,60);
    }

}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
not found