JColorChooser hangs event thread on Linux x64

Question

I am finding that repeatedly displaying a JColorChooser, picking a color, and clicking "OK" will hang the event thread in 64-bit Ubuntu 9.04 (Java 6 Update 13). Usually it takes between 2 to 20 launches of the JColorChooser before the color chooser will not launch and the UI is frozen. I cannot reproduce this using 32-bit Windows XP. I can even use the Sun Java Tutorial code and the problem occurs every time (Tutorial Link for a Color Editor in a JTable: http://java.sun.com/docs/books/tutorial/uiswing/examples/components/TableDialogEditDemoProject/src/components/ColorEditor.java).
Has anyone else seen this problem and found a workaround of any kind? Or has anyone tested this on 64-bit linux with Java 6 without problems? Thanks much to all for any help.

Answer 1

Here is a testbed that will produce the problem for me.
* 1) Run the testbed.
* 2) Click the button.
* 3) Pick a new color swatch.
* 4) Click OK.
* 5) Repeat steps 2-4 until the color chooser does not launch.
* (This was between 1 and 25 times for me)
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
* This class demonstrates a problem with JColorChooser.
* I encountered this problem launching a color chooser from a
* table cell, thus this example is based on table cell editor
* code from the Java Tutorial (ColorEditor.java). I have added a
* main() and removed some of the Table related noise.
* 1) Run.
* 2) Click the button.
* 3) Pick a new color swatch.
* 4) Click OK.
* 5) Repeat steps 2-4 until the color chooser does not launch.
* (This was between 1 and 25 times for me)
public final class ColorChooserTest implements ActionListener
private Color currentColor = Color.BLUE;
private final JButton button = new JButton("Push Me");
private final JColorChooser colorChooser;
private final JDialog dialog;
private static final String EDIT = "edit";
private final JFrame frame = new JFrame("JColorChooser TestBed");
public ColorChooserTest() {
button.setActionCommand(EDIT);
button.addActionListener(this);
button.setBorderPainted(false);
button.setBackground(currentColor);
//Set up the dialog that the button brings up.
colorChooser = new JColorChooser();
dialog = JColorChooser.createDialog(button,
"Pick a Color",
true, //modal
colorChooser,
this, //OK button handler
null); //no CANCEL button handler
final JPanel holder = new JPanel(new BorderLayout());
holder.setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
holder.add(button, BorderLayout.CENTER);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(holder, BorderLayout.CENTER);
frame.pack();
public void actionPerformed(final ActionEvent e)
if (EDIT.equals(e.getActionCommand()))
//The user has clicked the cell, so
//bring up the dialog.
button.setBackground(currentColor);
colorChooser.setColor(currentColor);
dialog.setVisible(true);
else
//User pressed dialog's "OK" button.
currentColor = colorChooser.getColor();
button.setBackground(currentColor);
public static void main(final String[] args)
final ColorChooserTest x = new ColorChooserTest();
x.frame.setSize(300, 300);
x.frame.setVisible(true);
}