calling R from Java

Greetings,
I would like to call a small R function from Java (actually
to Bioconductor).  From a little reading, looks like I can
only do this on a Unix system and not on a PC.  Is this indeed
the case?  Does anyone have experience with calling a R
function from Java?
Lana

Lana Schaffer
Research Specialist
The Scripps Research Institute
DNA Array Core Facility