Can't dispose my dialog after moving it using swing timer.

Question

Hi all,
I use the swing timer to move a dialog from one position to another. Here is the code I have use.
// Set the main window display location
    public void setWindowLocation()
        int screenHeight = Toolkit.getDefaultToolkit().getScreenSize().height;
        int screenWidth = Toolkit.getDefaultToolkit().getScreenSize().width;
        int frameHeight = this.getHeight();
        int frameWidth = this.getWidth();
        int _xValue = (screenWidth - frameWidth);
        int _yValue = (screenHeight - getTrayheight() );
        int _yEnd = (screenHeight - frameHeight - getTrayheight() );
        //this.setLocation((screenWidth - frameWidth), (screenHeight - frameHeight - getTrayheight() - WINDOW_SPACE));
        this.setLocation(_xValue, _yValue);
        while(_yValue > _yEnd){
            dialogMotion(this, _xValue, _yValue);
            _yValue -= 1;
        // this.dispose();
// Dialog motion
    private void dialogMotion(final MainDialog mainDialog, final int x, final int y){
        AbstractAction abAction = new AbstractAction() {
            public void actionPerformed(ActionEvent evnt) {
                mainDialog.setLocation(x, y);
        Timer motionTimer = new Timer(300, abAction);
        motionTimer.setRepeats(false);
        motionTimer.start();
// Find the taskbar height to place the main frame in lower-right corner
// of the viewable area of the screen.
    private static int getTrayheight(){
        return (Toolkit.getDefaultToolkit().getScreenSize().height -
                 GraphicsEnvironment.getLocalGraphicsEnvironment().getMaximumWindowBounds().height);
    }I think my code is clear to you. After moving the dialog onto the task bar, I want to dispose it. You can see that at the end of the while loop I've try it.
What happened there is, I can't see the dialog moving. it directly dispose. I add a breakpoint at the while loop and check, it iterate until condition is false. But I can't see the motion. If I comment the dispose code line as in my above code, I can see it moving.
Why is that. Your comment really helpful to me.
I'm worried is that debugging iterate that while loop but it is not visible. :( :(

Answer 1

Thanks a lot. I got the point all of you said. But it is bit confusing how to do it.
As i said in my first post, used slightly similar code to move down the dialog. Here what I have try. But the question is because of my thread used there, it wait little amount to scroll down.
    private void hideWindow(MainDialog mainGialog){
        try{
            int _xAbove = mainGialog.getLocation().x;
            int _yAbove = mainGialog.getLocation().y;
            int _yBelow = mainGialog.getLocation().y + mainGialog.getHeight() + getTrayheight();
            while(_yBelow > _yAbove){
                dialogScrollingUpDown(this, _xAbove, _yAbove);
                _yAbove += 1;
            Thread.sleep(1000);
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    try {
                        Thread.sleep(1500);
                        dispose();
                    catch (InterruptedException e) {
                        e.printStackTrace();
        catch (Exception ex) {
            System.out.println(ex.getMessage());
    private void dialogScrollingUpDown(final MainDialog mainDialog, final int x, final int y){
        AbstractAction abAction = new AbstractAction() {
            public void actionPerformed(ActionEvent evnt) {
                mainDialog.setLocation(x, y);
        Timer motionTimer = new Timer(400, abAction);
        motionTimer.setRepeats(false);
        motionTimer.start();
// System tray height
    private static int getTrayheight(){
        return (Toolkit.getDefaultToolkit().getScreenSize().height -
                 GraphicsEnvironment.getLocalGraphicsEnvironment().getMaximumWindowBounds().height);
    }Actually I called the hideWindow method in a button clicked event. After clicked the button, it wait a time equal to the first thread sleep. I can't reduce the time, if so dialog dispose instant.
Whay I can't do all those things is my IDE not allowed to use frequently changing values in dialogScrollingUpDown method. You can see that in my code.
Any comments for that.