It doesn't work for me either, and I have the latest version of java installed. =O
(I don't know if this has anything to do with it, but I was using command prompt to use binvox and viewvox and it was working fine, and then all of a sudden it gave me errors about it not being a command.)
Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
--- [binvox] mesh voxelizer, version 0.47, build #292 on 2010/11/16 09:57:09
--- written by Patrick Min, 2004-2010
loading model file...
Error opening [gipshand2-3k.obj]