Java DatagramSocket send to multicast group

 
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class Main {
   public static void main(String[] args) {
      try {//  w  w w .  j  a va 2 s . c  o m
         // Create a DatagramSocket
         DatagramSocket socket = new DatagramSocket();
         // Fill the buffer with data
         String msg = "Hello!";
         byte[] out = msg.getBytes();
         // Muticast group where packet has to sent
         InetAddress group = InetAddress.getByName("224.0.0.1");
         // Port the receiver listens on
         int port = 8379;
         // Create a DatagramPacket with buffer, address and port
         DatagramPacket packet = new DatagramPacket(out, out.length, group, port);
         // Send to multicast IP address and port
         System.out.println("Sending a packet...");
         // Send the packet now
         socket.send(packet);
         System.out.println("Sent : " + msg);
      } catch (Exception e) {
         e.printStackTrace();
      }
   }
}