实现的一个聊天程序

import java.io.*;import java.net.*;class Listen implements Runnable{Socket s;Listen(Socket s){this.s=s;}public void run(){String ip=s.getInetAddress().getHostAddress();while(true){try{BufferedReader br=new BufferedReader(new InputStreamReader(s.getInputStream()));String str=br.readLine();System.out.println(ip+"Client Say:");System.out.println(str);}catch (Exception e){}}}}class Write implements Runnable{Socket s;Write(Socket s){this.s=s;}public void run(){try{while(true){PrintWriter out=new PrintWriter(s.getOutputStream(),true);BufferedReader br1=new BufferedReader(new InputStreamReader(System.in));String str1=br1.readLine();out.println(str1);}}catch(Exception e){}}}public class Server {public static void main(String[] args)throws SocketException,IOException  {ServerSocket sc=new ServerSocket(12000);Socket ss=sc.accept();new Thread(new Listen(ss)).start();new Thread(new Write(ss)).start();}}

import java.io.*;import java.net.*;class Listen1 implements Runnable{Socket s;Listen1(Socket s){this.s=s;}public void run(){while(true){try{BufferedReader br=new BufferedReader(new InputStreamReader(s.getInputStream()));String str=br.readLine();System.out.println("Server Say:");System.out.println(str);}catch (Exception e){}}}}class Write1 implements Runnable{Socket s;Write1(Socket s){this.s=s;}public void run(){try{while(true){PrintWriter out=new PrintWriter(s.getOutputStream(),true);BufferedReader br1=new BufferedReader(new InputStreamReader(System.in));String str1=br1.readLine();out.println(str1);}}catch(Exception e){}}}public class Client{public static void main(String[] args)throws Exception {Socket s=new Socket("172.16.99.99",12000);  new Thread(new Listen1(s)).start();//读取信息线程new Thread(new Write1(s)).start();//发送信息线程}}