Early access to JDK 11

Change effective on 02 August 2018

Heroku now provides early-access versions of JDK 11. To use JDK 11 with your Java, Scala, Clojure, Groovy, or JRuby application, create a system.properties file in the root directory of your repository with the following contents:

java.runtime.version=11

Then add the file to Git, and JDK 11 will be installed the next time you deploy.

For more information on configuring your JDK, see the Dev Center documentation for Java. For more information on JDK 11, see the official OpenJDK documentation.