You need to configure your J2EE App to make use of SSO solution you want to use. OracleAS 10gR3 document states how to do that – http://download.oracle.com/docs/cd/B25221_04/core.1013/b25209/reconfig.htm#i1013341.

Thanks,
Preet

Thanks for this article. If I have a own J2EE web based application on my Oracle AS 10gR3, I have to use Enterprise SSO.
Or I have to use some kind of Ora API?

Thanks in advance,
Peter