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Well, the quickest way to get a confirmer going is to use my python code: https://github.com/biophil/pocket

I create my accounts directly with the python-steem library, but I assume any Steem command-line wallet would allow you to do that.

Then you get my python code, contact me for a recent version of the database, and run python3 blockchain_reader.py.

If you wanted to use Java you'd have to implement your own confirmer bot from scratch, and I have no idea what Java tools are out there for Steem, if any.