用java.swing实现的聊天系统

package com.lary.chatroom; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.ServerSocket; import java.net.Socket; import java.util.Collection; import java.util.Date; import java.util.Hashtable; import java.util.Map; import java.util.Set; public class ChatRoomServer { private ServerSocket ss; private Map onlineUsers; public ChatRoomServer(){ try { ss=new ServerSocket(8090); onlineUsers=new Hashtable(); } catch (IOException e) { e.printStackTrace(); } } public void startService(){ Socket s=null; try { while (true) { s = ss.accept(); new ChatRoomServerThread(s).start(); } } catch (IOException e) { e.printStackTrace(); } } class ChatRoomServerThread extends Thread{ private Socket s; private BufferedReader br; private PrintWriter pw; public ChatRoomServerThread(Socket s){ this.s=s; try { br=new BufferedReader(new InputStreamReader(s.getInputStream())); pw=new PrintWriter(s.getOutputStream()); } catch (IOException e) { e.printStackTrace(); } }