FULL PRODUCT VERSION :
java version "1.7.0_05"
Java(TM) SE Runtime Environment (build 1.7.0_05-b05)
Java HotSpot(TM) 64-Bit Server VM (build 23.1-b03, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Mac OS X 10.7.4

A DESCRIPTION OF THE PROBLEM :
The JMenuItem calls actionPerformed method of the action class 2 times if the accelerator key with the command key mask is set and the Mac's screen menu bar is used.


REGRESSION. Last worked in version 7

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1, Execute the source code included.
 java MenuTestFrame

2, Push Command+n

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
It should output only one number.
ACTUAL -
It outputs 2 numbers.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;

import javax.swing.AbstractAction;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;


public class MenuTestFrame extends JFrame{
public MenuTestFrame() {
JMenuBar menuBar = new JMenuBar();
JMenu menu = new JMenu("test");
JMenuItem item = new JMenuItem(new TestAction());

item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, KeyEvent.META_MASK));
menuBar.add(menu);
menu.add(item);
this.setJMenuBar(menuBar);
}

class TestAction extends AbstractAction {
public TestAction() {
super("test");
}

@Override
public void actionPerformed(ActionEvent arg0) {
System.out.println(System.currentTimeMillis());
}

}

public static void main(String[] args) {
System.setProperty("apple.laf.useScreenMenuBar", "true");
MenuTestFrame frame = new MenuTestFrame();
frame.pack();
frame.setVisible(true);
}
}

---------- END SOURCE ----------