(ScreenListener)listeners.elementAt(i);
(ScreenListener)lc.elementAt(i);
   private void fireScreenSizeChanged() {      if (listeners != null) {         int size = listeners.size();         for (int i = 0; i < size; i++) {            ScreenListener target =                  (ScreenListener)listeners.elementAt(i);            target.onScreenSizeChanged(numRows,numCols);         }      }   }