Random program generator

[James Lindsay]

Hello all,
I am interested in generating random java programs for some simulations 
I am running. I have found through google searches that one area which 
uses randomly generated programs is in compiler testing. I've found an 
IEEE article from 2003,"Random Program Generator for Java JIT Compiler 
Test System" but it is a pay article.

Does anyone have a program, or source code which generates random java 
programs which will compile?

Thanks,
James