Java Programming

After some searching, I have come across several ways to read arbitrary registry values:
1. jRegistryKey - this doesn't work in 64-bit Java; I suspect any JNI would need two separate dlls to be able to run in both 32-bit and 64-bit Java. I also have a vague memory that its method to check for the existence of a registry key doesn't work properly, and threw an exception instead of just returning false, but that may have been fixed by now.
2. JNIRegistry - I only saw one dll, so I figure this would probably hit the same problem with 32-bit vs. 64-bit.
3. NativeCall - does more than just registry handling, but again, one dll probably limits it to 32-bit Java
4. JWinAPI - I can't find adequate documentation for it; it looks like it uses an exe rather than a dll, but here again I doubt it would work for both 32-bit and 64-bit Java.
5. Preferences hacking - I don't consider this reliable, because it forces access to private methods of a private class, and the names of those private methods could change in a newer version of Java (also, it violates the separation of interface and implementation)
6. "reg.exe query" - works in both 32-bit and 64-bit Java (I know from personal experience), but breaks keys, value names, and data that can't be represented with an 8-bit character set. Also, this requires parsing.
7. "reg.exe export" - deals with 16-bit characters better, but outputs to a file which has to then be read and parsed, so it's a bit slower.
Using "reg.exe" has the advantage that it can be separately elevated in Vista or Windows 7 for creating or deleting keys without elevating the whole Java program.

However, I'm wondering if there's a better way to do this, such as a JNI-based library that runs in both 32-bit and 64-bit Java (with alternate dlls), or a library that launches "reg.exe" for different things, and could take care of the parsing for me (and maybe optionally elevate (with UAC prompt) when creating or deleting keys).