Java tutorial
import java.net.InetAddress; import java.net.InetSocketAddress; import java.net.NetworkInterface; import java.net.StandardProtocolFamily; import java.net.StandardSocketOptions; import java.nio.channels.DatagramChannel; import java.nio.channels.MembershipKey; public class Test { public static void main(String[] args) throws Exception { NetworkInterface networkInterface = NetworkInterface.getByName("net1"); DatagramChannel dc = DatagramChannel.open(StandardProtocolFamily.INET); dc.setOption(StandardSocketOptions.SO_REUSEADDR, true); dc.bind(new InetSocketAddress(8080)); dc.setOption(StandardSocketOptions.IP_MULTICAST_IF, networkInterface); InetAddress group = InetAddress.getByName("180.90.4.12"); MembershipKey key = dc.join(group, networkInterface); } }