0- prerequest :  you must have Java installed in order to proceed.
1- download and install maven
2- make sure you installed by showing the version and other info of it: 
mvn --version
3- Creating a Project:
 
mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false
4- 
cd my-app
5- you will see standard project structure there:
my-app
|-- pom.xml
`-- src
    |-- main
    |   `-- java
    |       `-- com
    |           `-- mycompany
    |               `-- app
    |                   `-- App.java
    `-- test
        `-- java
            `-- com
                `-- mycompany
                    `-- app
                        `-- AppTest.java
 6. The POM 
 The pom.xml file is the core of a project's configuration in Maven.
 It is a single configuration file that contains the majority of information required to build a project 
 Example:
 

 
  4.0.0
 
  com.mycompany.app
  my-app
  1.0-SNAPSHOT
  
 
  
    1.8
    1.8
  
 
  
    
      junit
      junit
      4.12
      test
    
  




7. Build the Project
mvn package

8. test the newly compiled and packaged JAR with the following command:
java -cp target/my-app-1.0-SNAPSHOT.jar com.mycompany.app.App
Which will print the quintessential:
  Hello World!