Java support

[vkhashimoto]

In the discussion, Jason mentioned it was okay for me to pick up the issue, so I'm creating this issue to avoid duplicate work in Java support

[mickeynp]

Thanks for your interest in adding support for Java! Let me know if I can help in the discussion thread.

[mobid]

I have just created PR #142 with implementation which I used for a while.

Feel free improve it or take it for a reference.