Java网络聊天服务器端

//Java网络聊天服务器
import java.io.*;
import java.awt.*;
import java.net.*;
import java.util.*;
import java.awt.event.*;
public class ServerFrame extends Frame implements ActionListener{
int ScreenWidth,ScreenHeight;
Button CloseServer;
TextArea ServerStatus;
ServerThread sThread;
public ServerFrame(){
super("游戏服务器");
ServerStatus = new TextArea();
CloseServer = new Button("关闭服务器");
ServerStatus.setEditable(false);
CloseServer.addActionListener(this);
add(ServerStatus,BorderLayout.CENTER);
add(CloseServer,BorderLayout.SOUTH);
ScreenWidth = getToolkit().getScreenSize().width;
ScreenHeight = getToolkit().getScreenSize().height;
setSize(ScreenWidth/2,ScreenHeight /2);
setLocation((ScreenWidth - getWidth())/2,
(ScreenHeight - getHeight())/2);
setResizable(false);
setVisible(true);
sThread = new ServerThread(this);
sThread.start();
}
public static void main(String[] args){
new ServerFrame();
}
public void actionPerformed(ActionEvent e){
dispose();
System.exit(0);
}
}
class ServerThread extends Thread{
int sPort;
ServerSocket sSocket;
ServerFrame frame;
TextArea sStatus;
Vector Clients;
Vector messages;
BroadCast BroadCastWriter;
CleanDeadConnect Cleaner;
public ServerThread(ServerFrame f){
Clients = new Vector();
messages = new Vector();
try{
sPort = 6633;
sSocket = new ServerSocket(sPort);
}catch(IOException E){
System.out.println("发生异常: "+E);
System.out.println("无法建立服务器接口！！");
System.exit(1);
}
this.frame = f;
sStatus = frame.ServerStatus;
sStatus.append("游戏服务器已启动..\n\n"