Does it Exist?

No

This is because a Java app that uses the CPU to attempt to mine Bitcoin will not be able to mine Bitcoin.

Just as a blindfolded sleepy two-year old child on an unassisted ride-on plastic toy car will never win a F1 race.

Does it Exist?

No

This is because a Java app that uses the CPU to attempt to mine Bitcoin will not be able to mine Bitcoin. There is no good incentive for anyone to create such a thing.