Hello,
I have experience with comparable tools, on native windows applications.
Since you application is in java, I believe we'll need to integration some eleckey libs and make some modifications.
There's no guide in their website, but I believe they're offering such material for subscribed users.
There's nothing to we can't perform in that case.
I look forward to perform this task for you, and ensure that full documentation will be delivered so you can perform the protection in your own in the future.
Regards