Code for Variations with repetition (combinatorics)?

Question

Does anyone have Java code for generating all VARIATIONS WITH REPETITION?

There are plenty of permutation and combination examples available, and variations must be

Answer 1

How to write a brute-force password cracker

While this is no Java implementation, the part doing the permutations should be quite easy to port in Java.

I ported it to C with no knowledge of Python, and it worked like a charm.