>Can we think that this version supports PostgreSQL 9.6 (beta2) and OpenJDK
9?
Technically speaking, we test OpenJDK 9 + PostgreSQL 9.5 combination.
9.6 is tested as a part of JDK8 + PostgreSQL 9.6 test
Here's test matrix: https://travis-ci.org/pgjdbc/pgjdbc/builds/145006814
However, I think it should be rather safe to assume OpenJDK 9 + PostgreSQL
9.6 would work just fine.
Vladimir