There have
been several threads posted about documentation on and the experience of programming Java for the cRIO, but as far as I know, the software needed to program the cRIO in Java is still restricted to the Beta-testing teams. You would need the JVM compiled for the cRIO (similar to how you have to set your cRIO in either LabVIEW or WindRiver mode now), which hasn't been released yet, AFAIK.
--Ryan
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FRC 1708, 2009-2012, College mentor; 2013-2014, Mentor
FRC 766, 2015-, Mentor