Flashing JFrame

Question

Hi,
I would like to create a JFrame with two specifal features:
1. JFrame should not grab focus while maximized from minimized state.
2. When a JFrame created or became maximized from minimized state, it should flash in the Windows bar until a user will grant a focus to it. (like as in ICQ clients [url http://i.imgur.com/dKwJV.jpg]flashing example ).
Does anybody know how the second requirement can be implemented?
Little self-explained example:
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class JFrameTest {
    private static JFrame childFrame;
    public static Container getParentContentPane() {
        JPanel panel = new JPanel();
        JButton button = new JButton("Create\\Restore child frame");
        button.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e) {
                createOrRestoreChildFrame();
        panel.add(button);
        return panel;
    private static void createOrRestoreChildFrame() {
        if (childFrame == null) {
            childFrame = new JFrame("Child Frame");
            childFrame.setLocation(200, 200);
            childFrame.add(new JLabel("Child Frame"));
            childFrame.pack();
            setChildFrameVisible();
        } else {
            setChildFrameVisible();
    private static void setChildFrameVisible() {
        childFrame.setFocusableWindowState(false);
        childFrame.setVisible(true);
        flashInWindowsBar(childFrame);
        childFrame.toFront();
        childFrame.setFocusableWindowState(true);
     * Should Make child frame flash in Windows bar.
     * Currently, it does not work for me.
     * Could anybody help me to fix this please? )
    private static void flashInWindowsBar(JFrame childFrame) {
        childFrame.setState(JFrame.ICONIFIED);
        childFrame.toFront();
    private static void createAndShowGUI() {
        JFrame parentFrame = new JFrame("JFrame Demo");
        parentFrame.setLocation(100, 100);
        parentFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        parentFrame.setContentPane(getParentContentPane());
        parentFrame.pack();
        parentFrame.setVisible(true);
    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
}Thanks!
Edited by: user1106343 on Nov 30, 2010 2:10 AM
Edited by: user1106343 on Nov 30, 2010 2:11 AM

Answer 1

In the future, you should at least alert users that you've cross-posted (which is frowned upon):
http://stackoverflow.com/questions/4305837/flashing-jframe
http://www.coderanch.com/t/518839/GUI/java/Flashing-JFrame