I was thinking about tutorials I've seen and I think NeHe (
http://nehe.gamedev.net/) probably has the best arrangement. In this case, NeHe has a wide variety of very basic tutorials for using OpenGL which tie in nicely to JPCT. Each tutorial consists of about one short page of code focusing on a single and relatively simple topic.
Perhaps, like NeHe, JPCT could add a "Tutorial" section to the main page? Browsing through the JPCT forum, there's a tremendous amount of information available but it does take knowing what to look for. I think just having a section for tutorials, which users could contribute to, would encourage active users to compose tutorials. It doesn't take much time to compose a one page tutorial for a single topic and JPCT has a variety of users who are very experienced and helpful (judging by their forum posts) programmers who, I am sure, would gladly contribute to a formatted section of the forum. I think an ability for users to submit a request for tutorials would also help. It would give active programmers a focal point for submissions.
I realize that submissions of tutorials would have to be reviewed, tested and edited for accuracy and that would take time. Yet, overall, they should contribute greatly to accessibility for new users and provide valuable information for focus points for future releases.
Tutorial viewers should be aware that the tutorials are focused on JPCT. Links to information for Java, Swing, AWT, Java 2D, LWJGL and OpenGL could be provided.