public void mouseMoved(MouseEvent e) {
   JTable table = (JTable) e.getSource();
   Object tag = getTagAt(e);
   if (tag == myTag) {
     table.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
   } else {
     table.setCursor(Cursor.getDefaultCursor());
   }
 }