Why fullscreen application hangs on debug

Question

why fullscreen application hangs on debug
My application runs in full-screen with resolution 1024-768 with the following code:
GraphicsDevice device;
  public void startApplication() throws Exception
      boolean isFullScreen = device.isFullScreenSupported();
       if (isFullScreen) {
            device.setFullScreenWindow(this);
            validate();
            frame.setVisible(true);
        } else {
            System.out.println("Your Screen Does't Support Full Screen");
    } // eof startApplication method
     * @param arg String[]
     * main() method
    public static void main(String[] arg)
        try
         GraphicsEnvironment ge = GraphicsEnvironment.
                                    getLocalGraphicsEnvironment();
            GraphicsDevice gs = ge.getDefaultScreenDevice();
            ApplicationDesktop desktop = new ApplicationDesktop(gs);
//ApplicationDesktop  extends Jframe
           desktop.initComponents();
           desktop.startApplication();
          }catch(Exception ex)
             ex.printStackTrace();
          }

Answer 1

Maybe because your debugger is stealing the focus of your full-screen window.
Try to add a WindowFocusListener to your window, making it iconifing or whatever when it loses the focus.
Just a guess.
Hidralisk