private static void initUsableDisplaySizes(){
  displaySizes.add(new Dimension(640,480));
  displaySizes.add(new Dimension(800,600));
  displaySizes.add(new Dimension(864,486));
}

private static void initUsableDisplaySizes ( ) { displaySizes . add ( new Dimension ( 640 , 480 ) ) ; displaySizes . add ( new Dimension ( 800 , 600 ) ) ; displaySizes . add ( new Dimension ( 864 , 486 ) ) ; }
initialize list of dimensions that can be used for the clients display area .
