I am trying to do exactly this at the moment with Sybase . It all depends on what you want to do with the data in the JTable. If u only want to provide a readonly access you simply need to add the ResultSet(Making it SCROLLABLE).
You will find the source code here
The problems begin when you want to ResultSet to be updatable and want to update the underlying database using the JTAble Front end. Here you need to find if the JDBC driver you use is fully compliant with JDBC 2.0. For example the jconnect driver of Sybase only allows updatable ResultSet in FORWARD_ONLY cursurs. Hence I need to use other strategies. Follow the url above and the documentation for yoiur jdbc drivers and you will find a way around your problems.