Any good resource for learning both JEE *and* J2EE simultaneously?

Question

I am looking for a good resource that teaches JEE while also explaining how the same code, concept, and 'mindset' would have been handled in the older, J2EE era. I need the material to cover all the API and developer-architect mindsets that have (significantly) changed in JEE, with EJB and Persistence being two that I know of.

Does there exist any such resource: book, or online material?

I have, for example, not read the J2EE and JEE tutorials by Sun/Oracle, nor have done any enterprise programming before, so don't know if these two tutorials will be the right resources for me.

Many thanks in advance for your time.

PS: I need to learn about J2EE for dealing with legacy codebase.

Answer 1

Grab Real World Java EE Patterns Rethinking Best Practices by Adam Bien. It focuses on Java EE but covers topics such as:

• How patterns changed from J2EE to Java EE
• EJB 2 - EJB 3 migration strategies

Definitely a great book, I recommend it.

That's IMO a more realistic target than "learning" both Java EE and J2EE in the same time (I don't think it's possible to replace years of practice and to swallow more than 10 years of evolution in a short time).