public  void hierarchyChanged(HierarchyEvent he) 
{
            if ((he.getChangeFlags() & HierarchyEvent.DISPLAYABILITY_CHANGED) != 0) {
                if (progressBar.isIndeterminate()) {
                    if (progressBar.isDisplayable()) {
                        startAnimationTimer();
                    } else {
                        stopAnimationTimer();
                    }
                }
            }
}

 public  void propertyChange(PropertyChangeEvent e) 
{
            String prop = e.getPropertyName();
            if ("indeterminate" == prop) {
                if (progressBar.isIndeterminate()) {
                    initIndeterminateValues();
                } else {
                    //clean up
                    cleanUpIndeterminateValues();
                }
                progressBar.repaint();
            }
}

 public  void stateChanged(ChangeEvent e) 
{
            BoundedRangeModel model = progressBar.getModel();
            int newRange = model.getMaximum() - model.getMinimum();
            int newPercent;
            int oldPercent = getCachedPercent();
            if (newRange  > 0) {
                newPercent = (int)((100 * (long)model.getValue()) / newRange);
            } else {
                newPercent = 0;
            }
            if (newPercent != oldPercent) {
                setCachedPercent(newPercent);
                progressBar.repaint();
            }
}