Officially moving to (at least) Java 5
Unofficially most of the utilities here still worked with Java 1.4, but particularly in GUI mode some of the screens would break. Now, officially, any subsequent releases will require Java 5. In addition to compiling with 5 as my target I’m going to switch to using J5isms like generics where possible. Oracle is likely going to make getting sunset versions of Java harder than Sun did, so most users probably won’t have a problem with this. I’ll avoid J6isms for now (6 didn’t add much for app designers, in my opinion), but I would encourage you to run any of this software against Java 6. It’s all tested against 6 these days, and performance improvements are likely on most platforms.