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);
} catch (IOException e) {
System.out.println(e.getMessage());
}
}
}