Client.java

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

public class Client {

	public static void main(String[] args) throws Exception {
	Socket socket = null;
        PrintWriter out = null;
        BufferedReader in = null;

	String tag = args[0];

        try {
            socket = new Socket("localhost", 4445);
            out = new PrintWriter(socket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        } catch (UnknownHostException e) {
            System.err.println("Don't know about host: localhost.");
            System.exit(1);
        } catch (IOException e) {
            System.err.println("Couldn't get I/O for the connection to: localhost.");
            System.exit(1);
        }

        BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
        String fromServer;
        String fromUser;

	out.println(tag);

        while ((fromServer = in.readLine()) != null) {
            System.out.println("Server: " + fromServer);
            if (fromServer.equals("Bye"))
                break;
            if (((fromServer.startsWith("ADD")) || (fromServer.startsWith("REMOVE")))) {
		    
            	fromUser = stdIn.readLine();
            	if (fromUser != null) {
            		//System.out.println("Client: " + fromUser);
            		out.println(fromUser);
            	}        
            }
        }

        out.close();
        in.close();
        stdIn.close();
        socket.close();
    }


}