What's Fortish?
Many things to a lot of very different people.
In this case, the possibility to script Java in a manner reminiscent of Forth

What is needed (apart from a JVM):

    -- The FortIsh Java Interpreter written by Jack Woehr

Some extra's to plug and play (of course every Java package will do):

     -- jSyn, a sound processing Java package done by Phil Burk

     -- imageJ, an image processing Java package by Wayne Rasband

How to do it:

     -- Installation advice

     -- A few silly examples

A lot of help and many tips:

     -- Roedy Green's Java glossary, gotcha's etc

That'll do for now ...