write a program using Socket and ServerSocket to create chat application

import java.io.*;
import java.net.*;

class ChatServer{
   public static void main(String[] args){
      try{
         ServerSocket ss = new ServerSocket(5000);
         Socket s = ss.accept();

         DataInputStream din = new DataInputStream(s.getInputStream());
         DataOutputStream dout = new DataOutputStream(s.getOutputStream());

         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
         
         String msgin="", msgout="";

         while(!msgin.equals("end")){
            msgin = din.readUTF();
            System.out.println(msgin);
            msgout = br.readLine();
            dout.writeUTF(msgout);
            dout.flush();
         }
         s.close();
      }catch(Exception e){
       }
   }
}