I'm aware of a few different mechanisms for Java/Perl interfacing:

• There's the original JPL (Java-Perl Lingo), included with all modern Perl distributions, that allow Java and Perl to live in the same process.
• Java allows access to a remote JVM through remote procedure calls.
• Inline::Java is like JPL, but simpler to operate.
• B::JVM::Jasmin compiles Perl code directly to Java bytecodes.

Not exactly what you were looking for but maybe it might be useful to see what's happening already.

-- Randal L. Schwartz, Perl hacker