...
Proprietary to a single vendor.
Well the syntax is... but I don't think that's necessarily
a bad thing
(as otherwise there'd be a bazillion ways of
doing any one
thing and
we'd end up with C++ :-)
Far as I recall the bytecode spec is freely available though, so
anyone can write a compiler, VM, native compiler, or other utility.
Indeed, IBM has two brands of Java.
Peace... Sridhar