The datastax java driver is compatable with C* 2.0.x but it's still in beta.
<dependency>
<groupId>com.datastax.cassandra</groupId>
<artifactId>cassandra-driver-core</artifactId>
<version>2.0.0-beta1</version>
</dependency>
As for astyanax, they dont have an official release that supports 2.0 quite yet.