my project architecture

http://www.theserverside.com/news/1363885/Transforming-Legacy-Systems-to-J2EE-Architecture

java technical chalenges usefullinks

http://projecteuler.net/
http://www.javaranch.com/java-college.jsp

Weblogic links for java developers

http://wiki.eclipse.org/EclipseLink/Examples/JPA/WebLogic_Web_Tutorial