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Maven Create A Java Project

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A Quick tutorial on how to setup Maven for eclipse and Creating Java Project in Java.

Overview:

In this tutorial, We'll learn how to Setup Maven in eclipse and how to create a java.

Maven Create A Java Project

Eclipse Setup:


1) First Open eclipse click on Help -> Install New Software

Install-new-software


2) Opens a dialogue box then click on "add" button, provide "Maven" in name filed and "http://download.eclipse.org/technology/m2e/releases" in Location field. Click on add.



maven-add-url


3) Select checkbox "Maven Integration for Eclipse" and click on Next.
It will check the requirements  and dependencies and perform checks for installation.


select-maven-integration-plugin


4) Click on Accept and next

5) Installation will be done.

Project Creation:

Use any version of java and maven should be fine. Now we are creating a project with java 12 and Maven 3.6 version.

Run the below mvn template command in terminal or command prompt.


mvn archetype:generate -DgroupId=com.java.w3scools.blog -DartifactId=Java-W3schools -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false



You may receive the error saying "The goal you specified requires a project to execute but there is no POM in this directory" - "BUILD FAILURE".

If creating maven project first time ever then it will take a few minutes to download dependencies from repository to local machine.  

POM.xml:

Default a xml file is generated by maven which is named as "pom.xml".

<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.java.w3scools.blog</groupId>
  <artifactId>Java-W3schools</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>Java-W3schools</name>
  <url>http://maven.apache.org</url>

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

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

All needed libraries should be part of the pom.xml file.

If we need the code coverage jar then need to add the below as part of the pom.xml file.

<dependency>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>cobertura-maven-plugin</artifactId>
    <version>2.7</version>
    <scope>test</scope>
</dependency>

we can find all jars in mvn repository.

Life Cycle Phases:

Default phases:

validate: validate the project is correct and all essential information is available
compile: compile the source code of the project
test: test the compiled source code using a suitable unit testing framework. These tests should not require the code be packaged or deployed
package: take the compiled code and package it in its distributable format, such as a JAR.
integration-test: process and deploy the package if necessary into an environment where integration tests can be run
verify: run any checks to verify the package is valid and meets quality criteria
install: install the package into the local repository, for use as a dependency in other projects locally
deploy: done in an integration or release environment, copies the final package to the remote repository for sharing with other developers and projects.

Additional Phases:

There are two other Maven life cycles of note beyond the default list above. They are

clean: cleans up artifacts created by prior builds
site: generates site documentation for this project

Run Program:

Maven application by default provides a "hello world" program.

public class App 
{
    public static void main( String[] args )
    {
        System.out.println( "Hello World!" );
    }
}

Conclusion:

In this article, we have seen setting up the mvn in eclipse, creating mvn project and its phases.



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JavaProgramTo.com: Maven Create A Java Project
Maven Create A Java Project
A Quick tutorial on how to setup Maven for eclipse and Creating Java Project in Java.
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