public static void showDialog (final Thread thread, String msg) {
      final JDialog dialog = new JDialog() ;
      dialog.addWindowListener (new WindowAdapter() {
        public void windowOpened (WindowEvent e) {
          thread.start() ;
          new Thread (new Runnable() {
          @Override
          public void run() {
            // TODO Auto-generated method stub
           while (true){
             if(!thread.isAlive()){
               dialog.dispose();
               System.out.print("结束计算");
               break;
             }
           }  
          }
          }).start();
        }
      });
      
      Container conn = dialog. getContentPane() ;
      JProgressBar progressBar = new JProgressBar() ;
      progressBar.setIndeterminate (true) ;
      progressBar.setStringPainted (true) ;
      progressBar.setString (msg) ;
      conn.add(progressBar) ;
      dialog.setTitle("正在操作中...");
      dialog.setResizable (false) ;
      dialog.setUndecorated (true) ;
      dialog.setSize(500,50) ;
      dialog.setLocationRelativeTo (null) ;
      dialog.setModal (true) ;
      dialog.setVisible (true) ;
     }
showDialog(new Thread(new Runnable()   {
   @Override
   public void run() {
    
   }
      
     } ), "计算中..........");