Here is an interesting artice from Jeff Friesen discussing how to interact with a USB device using java: 

Java and USB by Jeff Friesen — Want to use a USB device in Java? Some with native abstractions, like mass-storage drives, work as you'd expect, but many devices like webcams and game controllers are simply invisible to the Java programmer. Jeff Friesen looks at two APIs that expose USB devices to Java, then shows how to build a Java USB implementation of your own.

Currently, Java does not officially support USB but Jeff discusses how you can use thirdparty APIs as well as his own API.  Readers may also be interested in the Bluetooth JSR.