Java: Protect Trial/Demo Period

Question

I searched, and only found a couple([1][2]) of answers here. None of them really answer my question though.

My application will have a thirty day trial period. What's the best way to protect the program? I'm not worried about crackers, just Joe Average reinstalling the program. Setting back the clock isn't really a concern either.

Answer 1

Here's exactly the question you're looking for:

Implementing a 30 day time trial