In this project, I will show how to put the Lejos NXJ firmware on your NXT and load a simple program. Lejos is simply Java for NXT, so if you know Java, you can easily learn Lejos. Any version of the NXT will work. I will be working on Ubuntu 11.04, but if you are using any other system, it is still easy to figure it out. Good luck!
Modding Your Lego NXT: Programming the NXT Brick in Java
In this project, I will show how to mod the infamous Lego NXT to run the Lejos NXJ firmware, the NXT version of Java. Either version of NXT will work for this project.