We have some boilerplate code in UDP where we receive packets. We essentially need to read packets from socket and pass them to receive method of TP. In UDP we have the same code repeated to read packets from multicast and unicast socket. Unify packet reading into one class - PacketReceiver and use PacketReceiver for both unicast and multicast socket. Use features of JDK5 as well.

See UDP.java revision 1.171