From the example of client1.java and server1.java, extends the work to enable chatting among peer to peer.

Hint :

1. Add looping for both file
2. prompt message to enter for both files
3. terminate communication when 'q' was press for both files. 'q' stands for quit.

(server 1)

import java.net.*; import java.io.*; class server1 { public static void main(String[] args) throws Exception { System.out.println("Server is Started"); ServerSocket ss = new ServerSocket(7777); System.out.println("Server is waiting"); Socket s = ss.accept(); System.out.println("Server is connected"); DataInputStream dis = new DataInputStream(s.getInputStream()); String str = (String)dis.readUTF(); System.out.println("Client : " + str); String nickName = "Testing from server";

DataOutputStream dout = new DataOutputStream(s.getOutputStream()); dout.writeUTF(nickName); dout.flush();

dout.close(); dis.close(); s.close(); } }

(client 1)

import java.net.*; import java.io.*; class client1 { public static void main(String[] args) throws Exception{ Socket s = new Socket("localhost", 7777); DataOutputStream dout = new DataOutputStream(s.getOutputStream()); dout.writeUTF("Hello");

DataInputStream dis = new DataInputStream(s.getInputStream()); String str = (String)dis.readUTF(); System.out.println("Data from server : " + str); dout.flush(); dout.close(); s.close(); } }