Change effective on 16 November 2017
The Heroku Java stack now includes support for Azul® Zulu® JDK versions 7u161, 8u152, and 9.0.1. To use Zulu with your app, create a
system.properties file in the root directory of your application with the following contents:
Add this file to Git, and the official buildpacks will install the specified version of the JDK on the next deployment.