installListeners();
  public void installUI(JComponent c)  {    super.installUI(c);    if (c instanceof JScrollBar)      {	scrollbar = (JScrollBar) c;	trackRect = new Rectangle();	thumbRect = new Rectangle();	scrollTimer = new Timer(200, null);	scrollTimer.setRepeats(true);	installComponents();	installListeners();	installDefaults();	configureScrollBarColors();	calculatePreferredSize();        layoutContainer(scrollbar);	      }  }