JDeveloper installation appears to have the wrong Persistence class

Question

I'm trying to use EJBs for the first time, and have run into a problem initialising an EntityManagerFactory. The examples I've been looking at use something like:
EntityManagerFactory emf = Persistence.createEntityManagerFactory("<persistence unit name>");
However, this gives me a compilation error. In my installation, the only valid forms of javax.persistence.Persistence.createEntityManager take no parameters, and a Map parameter, respectively.
I can't find any documentation on these forms of procedure!
I'm using JDeveloper 10.1.3.0.4, EJB 3.0, J2SE 1.5.0_05. The version of the Persistence class my project is using is in <jdev_home>\j2ee\home\lib\persistence.jar
Any help will be appreciated.

Answer 1

It's almost certainly some kind of version issue, but my JDeveloper explicitly supports EJB 3.0, so it must be possible to get it working. The biggest problem is that I can't find any documentation whatsoever of the version of the Persistence class I have, let alone examples of using it.
Ideally, I'd like to know which version of which libraries I need to upgrade to to use the current specification, and whether I can do this without corrupting my JDev installation. But I'd settle for just finding out how the version I do have is supposed to work.