It's a bit worrisome that there are no official Java drivers and the only unofficial Java project has been abandoned by its only author because he no longer uses Rethink.
Daniel @ RethinkDB here.
We're going to ship an official Java driver very soon.
We decided to focus on a small number of core drivers first while the protocol and query language were still undergoing rapid extension. Now that the protocol is stable, we're going to expand our official driver support step by step. The Java one will be first.
