Client Server Communication - Datagram Sockets

// Socket Programing – Datagram Sockets

// Client Server Communication

// Server Program

import java.io.*;

import java.net.*;

public class UDPServer

{

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

     {

          DatagramSocket ds;

          DatagramPacket dp;

         

          final int buf_size = 512;

          final int port = 1500;

         

          byte msg_rec[] = new byte[buf_size];

         

          try

          {

              ds = new DatagramSocket(port);

             

              dp = new DatagramPacket(msg_rec, Buf_size);

              ds.receive(dp);

                  

              String Msg = "Welcome " + (new String(dp.getData())).trim();

              System.out.println(Msg);

          }

          catch(Exception e)

          {

              System.out.println("Exception " + e);

          }

     }

}

             

             

             

             

// Socket Programing – Datagram Sockets

// Client Server Communication

// Client Program

import java.io.*;

import java.net.*;

import java.util.*;

public class UDPClient

{

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

     {

          DatagramSocket ds;

          DatagramPacket dp;

         

          final int port = 1500;

          final int buf_size = 512;

         

          Scanner s = new Scanner(System.in);

         

          byte[] msg_send = new byte[buf_size];    

         

          try

          {

              ds = new DatagramSocket();

              System.out.print("Enter data to send : ");

              String data = s.nextLine();

             

              msg_send = data.getBytes();

              InetAddress DA = InetAddress.getByName("localhost");

             

              dp = new DatagramPacket(msg_send, msg_send.length, DA, port);

              ds.send(dp);

          }

          catch(Exception e)

          {

              System.out.println("Exception " + e);

          }

     }

}