It was actually (for BeOS) a version for Mac that could compile BeOS PowerPC apps, and the version for BeOS (when fully licensed) was originally sold as “CodeWarrior”. The version of the compilers that originally shipped with BeOS had a limited linker (Something like it could only link apps up to a certain size.) I think that was true up till something like R3. But also, I used CodeWarrior on Mac hardware. CodeWarrior actually existed well in to the OSX era, and also on PC (and used it for PalmOS dev too back in the day.)
MetroWerks also sold an extension to the BeIDE that did Java development under BeOS and supported Java 1.0 (possibly 1.1), but that only runs under PowerPC and only really works well under PR2/R3. You can get it to work under R5, but it is flaky.