一个Socket的Client端的问题，想了很久。

这个是我程序的一部分，通过在主JFrame里按connect的JButton后连接到指定server,
但不知道是不是因为阻塞的问题，每次按下去后JButton就弹不上来，其他的按钮也不能点了，
我试着把输入输出分离做成多线程，但很难分开，初学java，希望大家指点。有类似的最好谈谈
最好有实例，谢谢，分不多20分全送了。class Client extends JDialog {
   public JTextField tf;
    public JTextArea display;
    public ObjectOutputStream output;
    public ObjectInputStream input;
    public String msg="";
    public Socket client;              
    public   String linkstatus;
        Box  box;
 //Thread st;
       

                  Client(JFrame frame){
         super(frame,"CLI Mode",true);
         Container cont=getContentPane();
         tf=new JTextField();
  //st=new Thread(this);
  box=Box.createVerticalBox();
         tf.setEnabled(false);
         tf.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent eve){
sendData(eve.getActionCommand());
tf.setText(null);
  }
          });
         cont.add(tf,BorderLayout.NORTH);
         display=new JTextArea();
  box.add(Box.createVerticalStrut(8));
  box.add(new JScrollPane(display));
         cont.add(box,BorderLayout.CENTER);
         setSize(640,480);
  setLocation(140,130);
  addWindowListener(new WindowAdapter()
   {
     public void windowClosing(WindowEvent e)
      {
        setVisible(false);
      }
   });   
    }    public void runClient(){
         try{  
   connectToServer();
   getStream();
                 processConnection();
                 closeConnection();
         }catch(EOFException eofe){
                display.append('\n'+"服务器中断连接！");
  connectresponse.append('\n'+"服务器中断连接！");
  connectresponse.setCaretPosition(connectresponse.getText().length());
         }catch(IOException ioe){
                ioe.printStackTrace();
         }
    }
    private void getStream()  { try{
         output=new ObjectOutputStream(client.getOutputStream());  
         output.flush();
   input=new ObjectInputStream(client.getInputStream());
  display.append("\n获得 I/O 输入输出！\n");         
         display.append("\n获得 I/O 输入输出！\n");
  connectresponse.append("\n获得 I/O 输入输出！\n");
  connectresponse.setCaretPosition(connectresponse.getText().length());
    } catch (IOException ioe1){ioe1.printStackTrace();}}

    private void connectToServer()   {try{
         display.setText("正在尝试到服务器的连接......\n");
         client=new Socket(t_ip.getText(),Integer.parseInt(t_port.getText()));
         display.append("Connected to:"+client.getInetAddress());
  linkstatus="OK";
    } catch (IOException ioe2){ioe2.printStackTrace();}}

    private void processConnection() throws IOException{
         tf.setEnabled(true);//设置tf的setenabled为true，以便客户能发送消息
         do{
             try{
                    msg=(String)input.readObject();
                    display.append("\n"+msg);
                    display.setCaretPosition(display.getText().length());
             }catch(ClassNotFoundException cnfe){
                    display.append("\n 收到不明类型");
connectresponse.append("\n收到不明类型");
connectresponse.setCaretPosition(connectresponse.getText().length());
             }
         }
         while(true);
    }
    private void closeConnection() throws IOException {
         display.append("\n 正在关闭连接");
  connectresponse.append("\n正在关闭连接");
  connectresponse.setCaretPosition(connectresponse.getText().length());
               try{
  output.close();
         input.close();
         client.close();
  linkstatus="CLOSED";}
         catch(SocketException skec) {skec.printStackTrace();}
    }
    private void sendData(String msg){
        try{
               output.writeObject(msg);
               output.flush();
               display.append(msg+'\n');
        }catch(IOException ioe){
               display.append("\n输出有误！");
 connectresponse.append("\n输出有误!");
 connectresponse.setCaretPosition(connectresponse.getText().length());
 linkstatus="SendError";
        }
    }
}