Get revision information for a file in a repository

[Shah Aditya A]

In my SVN repository, I have a bunch of files. Say the HEAD revision is 20 but 
the latest revision for a particular file is 17. How can I get the revision for 
that particular file and have it return 17 and not 20.

I have tried using doInfo method with SVNRevision.HEAD but that returns 20 and 
not 17.

Also, what is the subversion command line equivalent of that?

Thanks,
Aditya