I've made A LOT of Java program, including the one of power systems,
that made A LOT of complex matrix inversions very quickly.
And YES IT RUNS ON LINUX as all the progrmas I've made has been made on
linux and run on Windows WITHOUT NATIVE LIBRARIES.
I think you really don't know what Java is, you can ask yourself why is
one the most used languages now, check Sourceforge if in doubt.
Java virtual machines has been very optimized in the last years and
represent a hardware abstraction layer which I think is very necceasary
today specially for folks on NetBSD, Solaris, AIX or whatever you want.
Olgierd