Implementation of Socket Programming Using UDP

/* Implementation of Socket Programming Using UDP */

// UDPServer.java : A Simple UDP Server Program

import java.io.*;

import java.net.*;

import java.util.*;

public class UDPServer

{

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

 {

try

  {

Date d = new Date();

byte[] Message = d.toString().getBytes();

int Port;

BufferedReader Buf =new BufferedReader(new

InputStreamReader(System.in));

System.out.print(" Enter the Port Address : " );

Port=Integer.parseInt(Buf.readLine());

DatagramSocket ds = new DatagramSocket(4343);

DatagramPacket dp = new DatagramPacket(Message,

Message.length,InetAddress.getLocalHost(),Port);

ds.send(dp);

System.out.println(" Message Send Successfully. ");    

ds.close();

   }

catch(Exception e)

  {

              System.out.println(" Error : " + e.getMessage());

  }

 }

}

//  UDPClient.java : A Simple UDP Client Program

import java.net.*;

import java.util.*;

import java.io.*;

public class UDPClient

{

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

 {

try

  {

byte Message[] = new byte[2024];

int Port;

BufferedReader Buf =new BufferedReader(new

InputStreamReader(System.in));

System.out.print(" Enter the Port Address : " );

Port=Integer.parseInt(Buf.readLine());

DatagramSocket ds = new DatagramSocket(Port);

System.out.println(" Client is Ready To Receive a Message. ");

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

DatagramPacket dp = new

DatagramPacket(Message,Message.length);

ds.receive(dp);

byte[] info=dp.getData();

System.out.println(" Message Received From Server. ");

//  System.out.println(" The Current Server Time is : " + new

String(dp.getData(),0,dp.getLength()));  

System.out.println(" The Current Server Time is : " + new

String(info,0,dp.getLength()));

ds.close();

  }

catch(Exception e)

  {

              System.out.println(" Error : " + e.getMessage());

  }

 }

}

OUTPUT :

UDPServer.java :

javac UDPServer.java

java     UDPServer

 Enter the Port Address : 1234

 Message Send Successfully.

UDPClient.java :

javac UDPClient.java

java     UDPClient

 Enter the Port Address : 1234

 Client is Ready To Receive a Message.

 Waiting .....

 Message Received From Server.

 The Current Server Time is : Thu Sep 02 20:46:14 IST 2010