Hi...how can i add driver files for oracle jdbc connection

By modifying your classpath.

See the documentation for the IDE you are using and these documents for command line and jarfile use:

Edit: And that's as much as I am going to say about it. If you can't figure it out from these items than get a tutor to teach you about classpaths and how to use them as it always leads to frustation on both sides when attempted on a forum.