java swing fest testing without code

I'm looking for any possible method to automate testing of JAVA swing applications whose source code is not available. I have tried several tools(JUnit,Fest,etc), but they all require either source code(internal tests) or they need the main class of the application to be tested. Any alternative software for the same or any tool to determine component and component properties of the application (the source code not being a pre-requisite) will be useful. Thanks.