This program is the companion to my paper
Unit Lenghtenings of Tetrahedra
You compile the program using the command

javac *.java

Then you run the program using the command

java Main

If you want to see all the output of the 
program, you should run it from a window
that has a command line.

I have also included the main Mathematica 
files I used.  One of the files is very
short. It just encodes the Cayley-Menger
determinant.  The other one is used to
generate the data files CubeData4.java
and CubeData6.java