Build Java modules with Maven

Because the Pi4J V2 project follows the modular approach of Java, the functionality of the framework has been split into different modules, each with their own responsibility.

The easiest way to start a new project, is to copy one of the example projects which include a full Maven pom.xml-file with all the required steps and configurations to build the project with all its modules into the target/distribution directory.

Take for instance a look at the “Minimal example application”.

Build your project with:

$ mvn clean package

When finished, you will find the generated package and required Java-modules and can start your application with the provided run.sh script:

$ cd target/distribution
$ ls -l
total 644
-rw-r--r-- 1 pi pi 364456 Jun 19 10:04 pi4j-core-2.0-SNAPSHOT.jar
-rw-r--r-- 1 pi pi   7243 Jun 19 10:04 pi4j-example-minimal-0.0.1.jar
-rw-r--r-- 1 pi pi 142461 Jun 19 10:04 pi4j-library-pigpio-2.0-SNAPSHOT.jar
-rw-r--r-- 1 pi pi  37302 Jun 19 10:04 pi4j-plugin-pigpio-2.0-SNAPSHOT.jar
-rw-r--r-- 1 pi pi  26917 Jun 19 10:04 pi4j-plugin-raspberrypi-2.0-SNAPSHOT.jar
-rwxr-xr-x 1 pi pi    101 Jun 19 10:04 run.sh
-rw-r--r-- 1 pi pi  52173 Jun 19 10:04 slf4j-api-2.0.0-alpha0.jar
-rw-r--r-- 1 pi pi  15372 Jun 19 10:04 slf4j-simple-2.0.0-alpha0.jar
$ sudo ./run.sh