J2ee Design Patterns

Recently started to link my project on active record java in a j2ee environment.Did few examples, till now success.While doing this I stumbled upon few good links.

http://java.sun.com/blueprints/corej2eepatterns/Patterns/index.html
and
http://java.sun.com/blueprints/patterns/catalog.html

Enjoy in case these links are new to you. :)