NetBeans 5.5 Beta supports the Java Enterprise Edition 5 platform, and most notably the Java Persistence, EJB 3 and JAX-WS 2.0 specifications.
NetBeans IDE 5.5 Beta builds on the success of NetBeans 5.0 and adds support for Java EE 5 and Sun Java System Application Server PE 9. Got Web 2.0? Of course! NetBeans 5.5 generates JAX-WS 2.0 artifacts for Java SE 6 and Java EE 5 projects. We included Java Persistence support and support for Enterprise Java Beans 3. Additionally, there is a preview of the new Subversion support module available on the 5.5 Beta Update Center
Click here to download NetBeans IDE 5.5 Beta