I know that what you said is supposed to be true. However in my real world experience it is anything but. Cisco java programs are a disaster and require certain JVMs to run.
The enterprise Java applications we use require specific versions of specific Linux distros. It's possible that they would run on other distros, or even other operating systems, if you got the right JVM. But there's enough question about it that the companies that sell them for a substantial price aren't willing to promise even a little portability.
