Create UDP Server - Java Network

Java examples for Network:UDP

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Description

Create UDP Server

Demo Code

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

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

      DatagramSocket serverSocket = new DatagramSocket(9876);
      byte[] receiveData = new byte[1024];
      byte[] sendData = new byte[1024];
      // ww  w.  j a  va  2s .  c  om
      while(true) {
         DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
         serverSocket.receive(receivePacket);
         String sentence = new String(receivePacket.getData());
         System.out.println("RECEIVED: " + sentence);
         InetAddress IPAddress = receivePacket.getAddress();
         int port = receivePacket.getPort();
         String capitalizedSentence = sentence.toUpperCase();
         sendData = capitalizedSentence.getBytes();
         DatagramPacket sendPacket =
         new DatagramPacket(sendData, sendData.length, IPAddress, port);
         serverSocket.send(sendPacket);
      }
   }
}

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