modify this code to meet the requirements

PROGRAM TO DEMONSTRATE MULTITHREADING ECHO SERVER

import java.io.*;

import java.net.*;

import java.util.*;

public class MultiEchoServer

{

private static ServerSocket servsoc;

private static final int PORT = 1234;

public static void main(String[] args) throws IOException

{

try

{

servsoc = new ServerSocket(PORT);

}

catch (IOException ioEx)

{

System.out.println(" Unable to set up port!");

System.exit(1);

}

System.out.println(" Waiting for Client. ");

do

{

//Wait for client

Socket client = servsoc.accept();

System.out.println(" New client accepted. ");

//Create a thread to handle communication with this client and pass the constructor for //this thread a reference to the relevant socket

ClientHandler handler = new ClientHandler(client);

handler.start();

}while (true);

}

}

class ClientHandler extends Thread

{

private Socket client;

private Scanner input;

private PrintWriter output;

public ClientHandler(Socket soc)

{

//Set up reference to associated socket

client = soc;

try

{

input = new Scanner(client.getInputStream());

output = new PrintWriter(client.getOutputStream(),true);

}

catch(IOException ioEx)

{

ioEx.printStackTrace();

}

}

public void run()

{

String received;

do

{

//Accept message from client on the socket's input stream

received = input.nextLine();

//Echo message back to client on the socket's output stream

output.println("ECHO: " + received);

//Repeat above until 'QUIT' sent by client

}while (!received.equals("QUIT"));

try

{

if (client!=null)

{

System.out.println("client disconnected");

client.close();

}

}

catch(IOException ioEx)

{

System.out.println("Unable to disconnect!");

}

}

}

----------

PROGRAM TO DEMONSTRATE MULTITHREADING ECHO CLIENT

import java.io.*;

import java.net.*;

import java.util.*;

public class MultiEchoClient

{

private static InetAddress host;

private static final int PORT = 1234;

public static void main(String[] args)

{

try

{

host = InetAddress.getLocalHost();

}

catch(UnknownHostException uhEx)

{

System.out.println(" Host ID not found! ");

System.exit(1);

}

sendMessages();

}

private static void sendMessages()

{

Socket soc = null;

try

{

soc = new Socket(host,PORT);

Scanner networkInput =

new Scanner(soc.getInputStream());

PrintWriter networkOutput = new PrintWriter(soc.getOutputStream(),true);

//Set up stream for keyboard entry

Scanner userEntry = new Scanner(System.in);

String message, response;

do

{

System.out.print(

"Enter message ('QUIT' to exit): ");

message = userEntry.nextLine();

//Send message to server on the socket's output stream

//Accept response from server on the socket's intput stream

networkOutput.println(message);

response = networkInput.nextLine();

//Display server's response to user

System.out.println(" SERVER> " + response);

}while (!message.equals("QUIT"));

}

catch(IOException ioEx)

{

ioEx.printStackTrace();

}

finally

{

try

{

System.out.println(" Closing connection");

soc.close();

}

catch(IOException ioEx)

{

System.out.println("Unable to disconnect!");

System.exit(1);

}

}

}

}

-------------

this is the question

Write a Multithread Echo Client Server Program to display the following output.

Network Programming - JAVA

NOTE: the output will be in CMD ( Command Prompt )

Server Program Output:

i) When you run the server program, the following text must be displayed.

Student-ID started Multithread Echo Server on port number : xxxx

ii) If the client closes the connection by typing end, then the following text must be displayed at

the server.

Student-ID the Client Closed the Connection

iii) When you run the server program and if you did not enter the port number at run time,

the following text must be displayed.

You forgot to enter the port number-Student-ID

Client Program Output:

i) When you run the client program, the following text must be displayed.

Student-ID started Multithread Echo Client. Type end to close the Client

ii) When the client wants to send a message to the server, the following text must be displayed at

client.

Student-ID Please Enter Message for Server : xxxxxxx

iii) When the server echoes the client message, the following text must be displayed at client.

Server Echoed this Message Student-ID : xxxxxx

iv) When the client types end, the server echo message must not be displayed instead the

following text must be displayed.

Student-ID Client wants to close