jigsaw package

Main.java

package com.test.jigsaw;

import java.lang.instrument.Instrumentation;

public class Main {
  public static void premain(String agentArgs, Instrumentation inst) {
    Package pkg = Main.class.getPackage();
    System.out.println(pkg.getImplementationTitle());
    System.out.println(pkg.getImplementationVendor());
    System.out.println(pkg.getImplementationVersion());
    System.out.println(pkg.getSpecificationTitle());
    System.out.println(pkg.getSpecificationVendor());
    System.out.println(pkg.getSpecificationVersion());
  }
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.test.jigsaw</groupId>
    <artifactId>test</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                            <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
                        </manifest>
                        <manifestEntries>
                            <Premain-Class>com.test.jigsaw.Main</Premain-Class>
                            <Boot-Class-Path>test-1.0-SNAPSHOT.jar</Boot-Class-Path>
                        </manifestEntries>
                    </archive>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>