Go find a tutorial on creating a basic JNI program first. I think you'll find that, w/o having some way to recompile said device driver (and/or creating a native piece of "bridge" code, which means you'll need the driver's headers/etc) that you won't get too far. I'm also not sure how much access user-land code would have to link up against a device driver in Linux, though -- that might turn into a brick wall, and I'm nearly 100% sure no one in this forum has the expertise to really help out there. You'll want to look for a more dedicated/professional forum.