Java translation

Doing the C version.

For a level 7 kyu kata, it would be nice with something in between

The test-samples

x 2 y 1 z 1
x 1 y 2 z 3
x 2 y 2 z 2

attempt-samples

x 63224 y 56743 z 12581
x 48848 y 38254 z 26413

The description is too vague for a 7 Kyu kata. Either improve, or give some more examples in the test code to be able to deduce what exactly is to be calculated.