Please refer to http://forum.java.sun.com/thread.jspa?threadID=5180292&messageID=9702377#97 02377
There are currently no plans to release the next version of JSE.
All the JSE modules are now being developed at netbeans,.org as opensource:
http://www.netbeans.org
Please download NetBeans 5.5 or NetBeans 5.5.1 from netbeans.org. You can then download and install any add-on packs (like UML, enterprise pack etc) that meet your needs.
The current version (6.0) is under development and its latest milestone can be downloaded from http://dlc.sun.com/netbeans/download/6.0/milestones/latest/ .