Connection btween Jdeveloper & postgresql 8.3

Hi,

I am working with Jdeveloper 11, Java 1.6 and Postgresql 8.3 on Windows.

I got the jdbc driver  postgresql-8.3-604.jdbc2,
postgresql-8.3-604.jdbc2ee, postgresql-8.3-604.jdbc3 and
postgresql-8.3-604.jdbc4.

Please help to me to establish database connection in Jdeveloper.
Please give me step-by-step complete details of how to establish
connection between Jdeverloper and postgresql.

--
("""" )
( . o . )
(,,) (,,)

Regards

Vikas Zacharia