COPY FROM STDIN support for JDK 1.6

Hi all,

Currently I am using JDBC with Postgresql 8.3 and JDK 1.5.
I got the driver extension to support this setup from link - http://kato.iki.fi/sw/db/postgresql/jdbc/copy/

Now I want to upgrade my setup to JDK 1.6 with the same database version.
From where I can get the extension of JDBC-4 driver to support the COPY FROM STDIN operation ?
Is there any other way to support COPY using JDBC without the driver extension ?

This is the only thing not allowing me to upgrade JDK 1.5 to 1.6.

Thanks,
Vaibhav.