Tuesday, May 29, 2012

Datagram Client in Java

// Datagram Client or UDP client
// purpose of this example is to provide a fare idea about the working of UDP client server
// this client example works with server example and link to server example is given at the end of this code
// example works on the concept of UDP protocol (simple transmission model without implicit handshaking)

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

public class Client {
   
    public static void main(String[] args) {
     
      DatagramSocket clientSkt = null;
      InetAddress IPAdd = null;
      String text =null;
      DatagramPacket receivePkt= null;
      BufferedReader inFromUser =
         new BufferedReader(new InputStreamReader(System.in));
      try{
      clientSkt = new DatagramSocket();
      IPAdd = InetAddress.getByName("localhost");
      }
      catch(SocketException exp){
          System.out.println(exp);
      }
      catch(UnknownHostException exp){
          System.out.println(exp);
      }     
      byte[] sendData = new byte[1024];
      byte[] receiveData = new byte[1024];
      try{
      text = inFromUser.readLine();
      sendData = text.getBytes();
      DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAdd, 3030);
      clientSkt.send(sendPacket);
      receivePkt = new DatagramPacket(receiveData, receiveData.length);
      clientSkt.receive(receivePkt);
      }
      catch(IOException exp){
          System.out.println(exp);
      }
      String modifiedSentence = new String(receivePkt.getData());
      System.out.println("FROM SERVER:" + modifiedSentence);
      clientSkt.close();
    }
}

Datagram Server Source

1 comment:

  1. nice... for more java examples visit http://java2novice.com site

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