Hello!
It is quite obvious that you do not know anything about how the Gnutella network functions and if you do not know that then you for sure do not know anything about programming in JAVA.Please go to LimeWire's site and catch up on your knowledge.
http://www.limewire.com .
Kazaa what a nightmare!.When and if you switch to Gnutella and LimeWire and get to know more about it then you would probably also start hating Kazaa.LimeWire+Audiogalaxy in combination is unbeatable.
http://www.audiogalaxy.com
LimeWire ROCKS!