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Project structure and build tools

The project this time will contain many modules. We will still use Maven in this chapter. We will set up a so-called multi-module project in Maven. In such a project, the directory contains the directories of the modules and pom.xml. There is no source code in this top-level directory. The pom.xml file in this directory serves the following two purposes:

  • It references the modules and can be used to compile, install, and deploy all the modules together
  • It defines parameters for the modules that are the same for all of them

Every pom.xml has a parent and this pom.xml is the parent of the pom.xml files in the module directories. To define the modules, the pom.xml file contains the following lines:

<project> 
...
<modules>
<module>SortInterface</module>
<module>bubble</module>
<module>quick</module>
</modules>
</project>

These are the names of the modules. These names are used as directory names and also as artifactId in the pom.xml module. The directories in this setup look as follows:

$ tree 
|-SortInterface
|---src/main/java/packt/java9/by/example/ch03
|-bubble
|---src
|-----main/java/packt/java9/by/example/ch03/bubble
|-----test/java/packt/java9/by/example/ch03/bubble
|-quick/src/
|-----main/java
|-----test/java
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