External libraries

Different lists of the most used third-party non-JCL libraries include between 20 and 100 libraries. In this section, we are going to discuss those that are included in the majority of such lists. All of them are open source projects.

org.junit

The org.junit package is the root package of an open source testing framework JUnit. It can be added to the project as the following pom.xml dependency:

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>

The scope value in the preceding dependency tag tells Maven to include the library .jar file only when the test code...