JInternalDialog stealing the focus in Linux environment.

I have the code which opens new JInternalFrame (showPopup() method). When this code is called from EDT directly, for instance from actionPerformed() then newly opened JInternalFrame does not steal focus from other applications ... but If this code called from EDT, but for instance in SwingWorker done() method ... then it does, newly opened JInternalFrame steals focus from other appliaction. Some from GUI programmer point of view the same thread call the same piece of code but get the different behavior ... This is reproducable only under Linux OS (I have tried under Fedora and Scientific Linux) .... Any ideas ?
Below code which you can try, just compile and run ...
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.JDesktopPane;
import javax.swing.SwingWorker;
import javax.swing.WindowConstants;
import javax.swing.JInternalFrame;
public class FocusTest implements ActionListener {
     private JDesktopPane desktop;
     private JInternalFrame frame;
     private JInternalFrame iframe;
     private JButton button1;
     private JButton button2;
     public FocusTest(){
          JFrame externalFrame = new JFrame();
          desktop = new JDesktopPane();
          frame = createMainFrame();
          externalFrame.setSize(new Dimension(700, 300));
     private JInternalFrame createMainFrame() {
          button1 = new JButton("EDT Dialog");
          button1.setToolTipText("Wait 2 seconds then show popup, openInternalFrame(), directly in EDT (without any switching between threads).");
          button2 = new JButton("Worker Dialog");
          button2.setToolTipText("Wait 2 seconds then execute SwingWorker and in done method show popup, openInternalFrame()");
          JPanel panel = new JPanel();
         JInternalFrame internalFrame = new JInternalFrame();
         internalFrame.setBounds(new Rectangle(300, 150));
            try {
            } catch (Exception e) {
        return internalFrame;
     private void showPopup(){
         JPanel panel = new JPanel();
          panel.setLayout(new BorderLayout());
          JPanel msgspanel = new JPanel();
          msgspanel.add(new JLabel("INTERNAL FRAME"));
          panel.add(msgspanel, BorderLayout.PAGE_START);
          JPanel buttonpanel = new JPanel();
          final JButton ok = new JButton("Ok");
          final JButton cancel = new JButton("Cancel");
          panel.add(buttonpanel, BorderLayout.PAGE_END);
          iframe = new JInternalFrame();
          iframe.setTitle("Internal Frame");
          ok.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent evt) {
          cancel.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent evt) {
          iframe.setLocation(frame.getLocation().x+10, frame.getLocation().y+10);
          try {
            } catch (Exception e) {
     public void actionPerformed(ActionEvent e) {
          if (e.getSource().equals(button1)) {
               try {
              } catch (InterruptedException ex){
          } else if (e.getSource().equals(button2)) {
               try {
              } catch (InterruptedException ex){
               OpenerWorker worker = new OpenerWorker();
     private class OpenerWorker extends SwingWorker<Object, Object> {
          protected Object doInBackground() throws Exception {
               return null;
          protected void done() {
      * @param args
     public static void main(String[] args){
          SwingUtilities.invokeLater(new Runnable() {
              public void run() {
                   try {
                        new FocusTest();
                   } catch (Exception e){

Set ur path env variable in your .bash_profile or .bashrc file
Then just issue the command in your prompt
NB: if your are in a remote machine you need to set DISPLAY variable too
or you can directly to ur bin folder where you can see all the utilities.. you can run it like
linux ]./dbca

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