is it Possible to automate a Java appli using Selenium?

Hello,

I have a question on automation using Selenium.
I test a Java Application and currently we are using QTP to automate it and client isn't happy with the performance and the issues which we are encountering with QTP. There are many constraints which is bothering us to proceed with QTP.

Just a thought, since i very well knew that Selenium can automate only WEB Based interfaces, but since the application is Java was wondering if there is any API or any addins that can trigger class files of the Java application for interaction.

Any thoughts on this would be highly appreciated. If there is any further questions or any details needed further to understand the query would be happy to explain.

Regards.