A chat program

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 (); // The Thread for reading information new Thread (new Write1 (s )). start (); // message sending thread }}