Java 17 now available

Change effective on 15 September 2021

Heroku’s support for Java, Scala, Clojure, and Gradle now includes support for OpenJDK version 17. To use this version of the JDK, create a system.properties file in your application with the following contents:

java.runtime.version=17

After your next deployment, Heroku will install and run your app with OpenJDK 17. For more information, see the article on Heroku Support for Java in the Dev Center. For more information on JDK 17, see the official OpenJDK documentation.