I finally have a working a* function working on my computer and made it myself. I had bought the book "ai for game developers" and read through the chapter on pathfinding. I had a few mistypes that caused bugs but I was able to repair those. The code is in another language at the moment. In blitz basic 3d. This since I have more experience with that language. I will code the a* in Java in the future.
I will make a applet with a* pathfinding I think this weekend.