Change effective on 24 January 2020
Heroku’s support for Java, Scala, Clojure, and JRuby now includes the option of using JDK 13.0.2, 11.0.6, 8u242, and 7u252. To use one of these versions, create a
system.properties file in the root directory of your app with contents like:
For more information on these OpenJDK releases, please see the official OpenJDK documentation. For more information on supported versions and JDK vendors, please see the Dev Center guide to Java Support.