相关疑难解决方法(0)

我有正在处理的银行gui应用程序,我的jdialog的setvisible方法似乎有问题.在用户撤回有效金额后,我弹出一个简单的对话框,其中显示"正在进行交易".在我的dobackground方法中,我继续轮询以检查是否已收到交易.我尝试使用swingworker,我不明白为什么它不起作用.如果我删除setvisible调用它工作正常,那么为什么setvisible导致系统挂起？这是我的jbutton mouselistener中的代码:

SwingWorker<String,Integer> worker = new SwingWorker<String,Integer>(){

  JDialog waitForTrans = new JDialog((JFrame)null,true);
  public String doInBackground() throws Exception {
     waitForTrans.add(new JLabel("Updating balance in system. Please Wait..."));
     waitForTrans.setMinimumSize(new Dimension(300,100));
     waitForTrans.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
     waitForTrans.setVisible(true);
     Bank.getInstance().sendTransaction(currentPin,"-"+withdraw);
     while(!Bank.getInstance().hasCompletedTransaction){

     }
     return null;

  }

  public void done(){
   try {
        this.get();
       } catch (InterruptedException e) {
        e.printStackTrace();
    } catch (ExecutionException e) {

        e.printStackTrace();
    }
    waitForTrans.setVisible(false);
    newField.setText(String.valueOf(Bank.getInstance().getAccountList().get(currentPin).getBalance()));
  }

 };
 worker.execute();