The Sybase native JDBC driver that comes with Adaptive Server supports JDBC version 1.2. It is compliant with and supports several classes and methods of JDBC version 2.0. See Chapter 12, “Reference Topics,” for a complete list of supported and not supported classes and methods.
If your system requires a JDBC driver on the client, you must use jConnect version 5.2 or later, which supports JDBC version 2.0.