Thread Subject: Java and compiled Matlab

In the Matlab documentation (help), under the heading "Using
Java from MATLAB: An Overview" I read:

"Every installation of MATLAB includes a Java Virtual
Machine (JVM)"

Does this mean that a Java can be called from Matlab ONLY if
a Matlab licence (and "its" JVM) is present on the machine?
I would like to call Java from compiled ("stand-alone")
matlab code.

If the above configuration can work, which JVM will be
called by my matlab code? (I think that more than one JVM
might be present in a machine..).