SQL Developer itself does not include any JDBC drivers. The list below shows a selection of databases and drivers available online. A wider selection of JDBC drivers from various vendors can be found at the Sun Microsystems driver database.
To install a driver for SQL Developer just add the driver (ZIP or JAR file) to the dirvers list in the settings dialog.
==or try this---====
Edited by: Askdineshsinghminhas on Jan 18, 2013 9:53 AM
Looks like some Java code is required to make it all work.
When time presents I will explore this. It would be good to get it working.
For now I just have to use the Informix ODBC drivers with another tool.