Convert java script to JAVA b-spline -- 2

I found an interesting example of code for a b spline written in java script. I would like to have the portion of it that computes the spline in JAVA ( I am working in NetBeans). I don't need the user interface part, I only need the part that computes a point on a spline. The web site is here. [login to view URL] It is a small set of code, but I don't understand javascript well enough to do it. I was able to convert about 80% of it but not the whole thing.