I know you're not going to like this, but I would like to humbly request that you keep supporting older machines. The highest version of Java supported by my PowerBook G4 with Mac OS X 10.4 is Java 1.5.

Unfortunately there is no way to get a newer version of Java on that machine, besides switching the OS to Linux. The IBM versions of Java use op-codes that are not supported by the G4 PowerPC CPU, so they immediately fail. The OpenJDK BSD options just don't work.

The PowerBook G4 is still a fine machine for development work targeting an Apple II. AppleCommander 1.3.5 supported back to Java 1.3. That is a little crazy. But Java 1.5 support is a little less crazy.

Seeing that AppleCommander builds images for a vintage computer, I hope you can understand my preference for this old PowerBook G4, the last non-Intel Mac laptop. :-) :-)