java, etc

[JOE TESTA]

Ok one of my last tasks here(besides implementing RMAN) is to tell the developers how to call an external java program from like pl/sql. (unix-based)   Does this require me to have java loaded in the database(from what i've read I dont think so).   Does this require me to have an external proc listener(i think so, and have a .so file?).   What would be the best part of the oracle docs to be able to answer these questions for myself, with some examples if possible to show the developers?   thanks, joe