I know it's kind of a mixed bag. I'm also slightly, but not completely surprised that .Net and Java aren't officially supported.. I wouldn't expect JDBC support, but would expect to see a Java library for use with RethinkDB. Given the flexible nature of RethinkDB and other document databases, dynamic language environments tend to be much easier to support over static environments like .Net and Java.
Honestly, if you want to use RethinkDB with Java, it may be worthwhile to write a domain centered service with Node or Python and have that as an intermediary for Java. I've actually used Node on several occasions as a translation service for requests to foreign systems as sometimes there's a lot of disconnect in specific implementations of SOAP/WS-* services from Java/PHP/.Net etc. It tends to work very well for this use case.
I've actually been looking at GraphQL with some interest, and thinking this could be a pretty awesome option in front of RethinkDB, which would open up to pretty much any client that supports graph, which is limited right now...
Honestly, if you want to use RethinkDB with Java, it may be worthwhile to write a domain centered service with Node or Python and have that as an intermediary for Java. I've actually used Node on several occasions as a translation service for requests to foreign systems as sometimes there's a lot of disconnect in specific implementations of SOAP/WS-* services from Java/PHP/.Net etc. It tends to work very well for this use case.
I've actually been looking at GraphQL with some interest, and thinking this could be a pretty awesome option in front of RethinkDB, which would open up to pretty much any client that supports graph, which is limited right now...