README.md

java9modules-demo

A simple boilerplate project that combines Java 9 modules, gradle, IntelliJ settings and unit tests

How to run

• Install JDK 9 and gradle
• Clone this project, run gradle idea, open project in IntelliJ
  • Note: "calling gradle idea and using IDEA's importer are mutually exclusive" - if you run gradle idea, then don't use IntelliJ gradle importer
    • gradle/gradle#2813
• Take a look at the file structure: tree .
• gradle clean build run
• gradle clean build test

Notes

• To use Java 9 modularity, each Java 9 module needs to correspond to an IntelliJ IDEA module.

  • https://blog.jetbrains.com/idea/2017/03/support-for-java-9-modules-in-intellij-idea-2017-1/

• Jigsaw/Java 9 modules hello world:

  • http://openjdk.java.net/projects/jigsaw/quick-start

• Project structure with multiple modules and unit tests:

  • https://blog.senacor.com/unit-testing-with-java-9-jigsaw-and-junit/

• Gradle and Java 9 modules:

  • https://guides.gradle.org/building-java-9-modules/

• Switching between Java versions:

alias j9="export JAVA_HOME=`/usr/libexec/java_home -v 9`; java -version"
alias j8="export JAVA_HOME=`/usr/libexec/java_home -v 1.8`; java -version"