Here is an article of someone that installed the "default-jdk", whatever that is.
Have you tried that?
http://www.bogodyn.org/blog/?p=18

Hi,
Anyone managed to get the 1-Wire API for Java to work on the plug?
I guess there needs to be some JNI mapping to the native libusb driver.
I haven't got my plug yet, but as soon as I do I will try to make that work if no one else has done it.
// Ake