SAP jConnect version 4.1 and later include the package com.sybase.jdbcx that contains all of the SAP jConnect extensions to JDBC.
In versions of SAP jConnect earlier than 4.1, these extensions were available in the com.sybase.jdbc and com.sybase.utils packages.
The com.sybase.jdbcx package provides a consistent interface across different versions of SAP jConnect. All of the SAP jConnect extensions are defined as Java interfaces, which allow the underlying implementations to change without affecting applications built using these interfaces.
When you develop new applications that use SAP jConnect extensions, use com.sybase.jdbcx. The interfaces in this package allow you to upgrade applications to versions of SAP jConnect later than 4.0 with minimal changes.
Some of the SAP jConnect extensions have been changed to accommodate the com.sybase.jdbcx interface.