private void updateOnTop(){
  for (  final Window w : ontop) {
    w.setAutoRequestFocus(false);
    w.toFront();
    w.setAutoRequestFocus(true);
  }
}

private void updateOnTop ( ) { for ( final Window w : ontop ) { w . setAutoRequestFocus ( false ) ; w . toFront ( ) ; w . setAutoRequestFocus ( true ) ; } }
brings all added windows to the front , without giving them focus .
