@Override
                       public void actionPerformed(ActionEvent e) {
                           new SwingWorker<Void, Void>(){

                               @Override
                               protected Void doInBackground() throws Exception {
                                   Thread.sleep(500);
                                   return null;
                               }

                               @Override
                               protected void done() {
                                   dialog.dispose();
                               }
                           }.execute();
                       }