Heroku now supports Java on the Heroku Cloud Application Platform, the company announced yesterday.

Heroku decided on Java because of its popularity and its solidity as a language for building web apps.  It’s the fourth language supported, besides Ruby, Node.js and Clojure.

With Java  being the world’s most popular programming, this is exciting news for both Heroku and java programmers.

Heroku, the polyglot language platform-as-a-service provider, was bought last year by Salesforce.com.  You will find more practical information about this, including a ‘Heroku for Java’ workbook, next week at Dreamforce 2011.