This article contains Java 9 module example using maven. In order to provide reliable configuration and strong encapsulation in a way that is both approachable to developers and supportable by existing toolchains, we treat modules as a fundamentally new kind of Java program component. A module is a named, self-describing collection of code and data. Its code is organized as a set of packages containing types, i.e., Java classes and interfaces; its data includes resources and other kinds of static information.

Technology

  • Java 9
  • Maven 2.5
  • Maven compiler plugin 3.6.0

Module Structure

module-maven-example

module-maven-example

module declaration

A module’s self-description is expressed in its module declaration, a new construct of the Java programming language.

module-info.java

/**
 * Created by JavaDeveloperZone on 22-04-2017.
 */
module module.maven.demo {
 requires java.logging;
}

Demo.java

package com.javadeveloperzone;



import java.util.logging.Logger;

/**
 * Created by JavaDeveloperZone on 22-04-2017.
 */
public class Demo {
 public static void main(String... args) {
 Logger logger=Logger.getLogger(Demo.class.getName());
 logger.info("This is module demo using maven");
 }
}

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>module-demo</groupId>
    <artifactId>com.javadeveloperzone</artifactId>
    <version>1.0-SNAPSHOT</version>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.0</version>
                <configuration>
                    <source>9</source>
                    <target>9</target>
                    <showWarnings>true</showWarnings>
                    <showDeprecation>true</showDeprecation>
                </configuration>
            </plugin>
        </plugins>
    </build>


</project>

 

Build Project:

"C:\Program Files\Java\jdk-9\bin\java" -Dmaven.multiModuleProjectDirectory=F:\extrawork\java9-demo\module-maven-demo -Xmx2g -XX:ReservedCodeCacheSize=512m "-Dmaven.home=C:\Program Files (x86)\JetBrains\IntelliJ IDEA 2017.1\plugins\maven\lib\maven3" "-Dclassworlds.conf=C:\Program Files (x86)\JetBrains\IntelliJ IDEA 2017.1\plugins\maven\lib\maven3\bin\m2.conf" "-javaagent:C:\Program Files (x86)\JetBrains\IntelliJ IDEA 2017.1\lib\idea_rt.jar=65380:C:\Program Files (x86)\JetBrains\IntelliJ IDEA 2017.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files (x86)\JetBrains\IntelliJ IDEA 2017.1\plugins\maven\lib\maven3\boot\plexus-classworlds-2.5.2.jar" org.codehaus.classworlds.Launcher -Didea.version=2017.1 clean
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building com.javadeveloperzone 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ com.javadeveloperzone ---
[INFO] Deleting F:\extrawork\java9-demo\module-maven-demo\target
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.170 s
[INFO] Finished at: 2017-04-22T11:30:07+05:30
[INFO] Final Memory: 8M/28M
[INFO] ------------------------------------------------------------------------

Process finished with exit code 0

Output:

INFO: This is module demo using maven

 

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