It seems to me the UML module of NetBeans is a bit too much hidden. In NetBeans 6.5 it was very easy to create an UML diagram. No plugin installation necessary or sth. like. Re
With the current 7.2 Netbeans release the capability for UML Sequence and class diagram creation exists with the Visual Paradigm UML tool (version 10). You can get the trial version for 30 days that will do the reverse engineering from the code. Here is a link to the instructions. http://www.visual-paradigm.com/support/documents/vpumluserguide/2381/2384/66565_reverseengin.html ( The community version has this feature but it is disabled).