Allan Caine has written on his blog an entry on programming the HiTechnic Experiment’s Kit in Java with Lejos. You will find a download for interfacing with the HiTechnic Prototype board using Lejos as well as an excellent video tutorial where he goes through one of the experiments from the HiTechnic handbook using Lejos instead of NXC or NXT-G, which are the languages used in the handbook.
Here is the video that Allan produced. This is particularly interesting if you want to use Lejos with the Experimenter’s Kit but it is also an excellent introduction to the kit in general.
Thank you Allan, I’m sure this will be very useful!