Difference between
JDBC 2.0 and 3.0 is,
1.ResultSet Enhansements (Bi-Directional Scrolling available)
2.Rowsets implemented in JDBC 3.0
3.Savepoints and Cursors available in JDBC 3.0 only.
Hope that this will give you breif idea.
Thanks & Regards,
G Sirish Reddy.,