Java Socket 实现简易聊天程序

import java.awt.*;
import java.net.*;
import java.io.*;
import java.awt.event.*;
public class Client extends Frame implements Runnable
{
    private TextField nameBox=new TextField("<姓名>");
    private TextArea msgView=new TextArea();
    private TextField sendBox=new TextField();
    private BufferedReader reader;
    private PrintWriter writer;
    private Socket socket;
    public Client(String title)
    {
        super(title);
        msgView.setEditable(false);
        add(nameBox,"North");
        add(msgView,"Center");
        add(sendBox,"South");
        sendBox.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent ae)
            {
                try{
                    writer.println(nameBox.getText()+":"+sendBox.getText());
                    sendBox.setText("");
                }catch(Exception ie){}
            }
        });
        pack();        

    }

public void run()
{
    while(true){
        try{
            msgView.append(reader.readLine()+"\n");
        }catch(IOException ie){
        }
    }
}
private void connect()
{
    try{
        msgView.append("和服务器套接字连接\n");
       socket=new Socket("127.0.0.1",2554);
        msgView.append("聊天就绪\n");
        reader=new BufferedReader(
            new InputStreamReader(socket.getInputStream()));
        writer=new PrintWriter(socket.getOutputStream(),true);
           new Thread(this).start();        
    }catch(Exception e){
        msgView.append("连接失败");
    }
}
public static void main(String[] args)
{
    Client client=new Client("聊天");
    client.setVisible(true);
    client.connect();