FULL PRODUCT VERSION :
java version " 1.7.0_09 "
Java(TM) SE Runtime Environment (build 1.7.0_09-b05)
Java HotSpot(TM) 64-Bit Server VM (build 23.5-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Darwin machinename.com 12.2.0 Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64 x86_64

A DESCRIPTION OF THE PROBLEM :
JComboboxes do not allow you to change the selection via the mouse like other comboboxes in OS X. When you attempt to make a selection via a click on the combobox, the combobox cancels instead of making the selection.

Under a debugger, an NSFullScreenWindow steals focus away from the AWTWindow and forces the JCombobox to cancel. The JCombobox (and AWT) never get a chance to handle the click.

REGRESSION. Last worked in version 6u31

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1) Left Mouse Down and Up on a combobox (Note that the combobox stays open)
2) Click on a selection

ACTUAL: The combobox dismisses and cancels
EXPECTED: The combobox dismisses and selects the item

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
EXPECTED: The combobox dismisses and selects the item
ACTUAL -
ACTUAL: The combobox dismisses and cancels

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
import javax.swing.UIManager.LookAndFeelInfo;


/** @see http://stackoverflow.com/questions/7456227 */
public class Sandbox extends JPanel {

public static void main(String args[])
{
SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
try
{
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels())
    {
        if ( " Nimbus " .equals(info.getName()))
        {
UIManager.setLookAndFeel(info.getClassName());
break;
        }
    }
}
catch (Exception e)
{
}
final JFrame frame = new JFrame( " FullScreenTest " );
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
GraphicsDevice device = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();


JPanel content = new JPanel(new BorderLayout());
final JLabel label = new JLabel( " Selected Item " );
final JComboBox comboBox = new JComboBox();
    comboBox.addItem( " Item A " );
    comboBox.addItem( " Item B " );
    comboBox.addItem( " Item C " );
    comboBox.setSize(100, 15);
    comboBox.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
label.setText((String)comboBox.getItemAt(comboBox.getSelectedIndex()));
}
});
    
    JButton close = new JButton( " Close " );
close.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
WindowEvent windowClosing = new WindowEvent(frame, WindowEvent.WINDOW_CLOSING);
frame.dispatchEvent(windowClosing);
}
});
    
JPanel comboBoxContainer = new JPanel();
comboBoxContainer.add(comboBox);

content.add(label, BorderLayout.NORTH);
content.add(comboBoxContainer, BorderLayout.CENTER);
content.add(close, BorderLayout.SOUTH);

frame.setContentPane(content);
frame.setUndecorated(true);
frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
frame.pack();

device.setFullScreenWindow(frame);
frame.setVisible(true);
}
});
}
}
---------- END SOURCE ----------