Heroku now has an [Eclipse Plugin][1] that makes it super easy to deploy and manage Java apps on the Cloud! Here is a screencast that will show you how to get started with the Heroku Eclipse Plugin:
<iframe width="640" height="390" src="http://www.youtube.com/embed/N2Zfftu8GDw?rel=0" frameborder="0" allowfullscreen></iframe>

To learn more check out the [Heroku Eclipse Integration][1] site. Give it a whirl and let me know how it goes!

 [1]: http://eclipse-plugin.herokuapp.com/