Java tutorial
import java.net.DatagramPacket; import java.net.MulticastSocket; public class Main { public static void main(String[] argv) throws Exception { MulticastSocket msocket = new MulticastSocket(9999); byte[] inbuf = new byte[1024]; DatagramPacket packet = new DatagramPacket(inbuf, inbuf.length); msocket.receive(packet); // Data is now in inbuf int numBytesReceived = packet.getLength(); } }