import java.io.IOException;
import java.net.DatagramPacket;
import java.net.InetAddress;
import java.net.MulticastSocket;
import java.net.UnknownHostException;

public class MulticastReceiver {

	final static String INET_ADDR = "224.2.2.4";
	final static int PORT = 44444;

	public static void main(String[] args) throws UnknownHostException, InterruptedException {
		InetAddress addr = InetAddress.getByName(INET_ADDR);   	
		try(MulticastSocket s = new MulticastSocket(PORT)){
			s.joinGroup(addr);
			byte[] buf = new byte[256];
			DatagramPacket msgPacket = new DatagramPacket(buf, buf.length);
			while(true){
				s.receive(msgPacket);
				String msg = new String(buf, 0, buf.length);
				System.out.println("ServerSocket 1 received msg: " + msg);

			}          
		} catch (IOException ex) {
			ex.printStackTrace();
		}
	}
}