A barebones Java app, which can easily be deployed to Heroku.
This application support the Getting Started with Java on Heroku article - check it out.
Make sure you have Java and Maven installed. Also, install the Heroku Toolbelt.
$ git clone https://github.com/heroku/java-getting-started.git
$ cd java-getting-started
$ mvn install
$ foreman start web
Your app should now be running on localhost:5000.
$ heroku create
$ git push heroku master
$ heroku open
For more information about using Java on Heroku, see these Dev Center articles: