Java Modules Example Projects

This repo contains three Gradle Java projects compatible with Java 9 or above to show a very simple usage of the Module system.

The projects were created using gradle init and are:

• app - the main application
• libone - a library
• libtwo - another library

Project app depends on the two libraries and all three projects are modular since they include module-info.java files in their src/main/java directories.

Prerequisites

• Java 9 or above installed
• Gradle installed

Building (and running)

git clone git@github.com:twalmsley/java-modules.git

cd java-modules/libone

gradle clean build publishToMavenLocal

cd ../libtwo

gradle clean build publishToMavenLocal

cd ../app

gradle clean build run

Build a Small Custom JRE

cd java-modules/app/app

./link.sh

du -sh build/jre

Running

Use gradle:

cd java-modules/app/app

gradle run

Or use the command line:

cd java-modules/app/app/build/libs

export MVN_REPO=~/.m2/repository

java --module-path app.jar:$MVN_REPO/modstest/libone/1.0.1/libone-1.0.1.jar:$MVN_REPO/modstest/libtwo/1.0.1/libtwo-1.0.1.jar -m app.app.main --add-module app.app.main

Or use the custom JRE:

cd java-modules/app/build

./jre/bin/app