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2.4 Typical Directory Structure Under Maven

Juppies 2 by Dr Heinz M. Kabutz

Our package eu.javaspecialists.courses.juppies.anagrams.lib is mirrored in the same directory structure eu\javaspecialists\courses\juppies\anagrams\lib. This would be inside our Juppies2\AnagramGame\src\main\java. This is the most common structure for Java projects nowadays. Maven expects us to use a structure where the Java code is in src\main\java. There is also a src\test\java directory. This is where our JUnit test classes will go, typically in the same directory hierarchy as main. Since Maven expects this particular directory structure, our pom.xml is super simple. We can override the default structure, but then we have to customise our pom.xml file. Remember the Project Object Model (POM) is an XML file that is used to configure Maven. It manages our dependencies and will instruct Maven which other jar files to download. A jar file is a special type of library file that we use to store Java classes and other resource files such as images, text, xml, properties files, json, etc. It is actually a zip compressed file with an additional MANIFEST.MF file that describes our jar file. We can unzip the jar file with most compression tools.

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Heinz Kabutz Java Conference Speaker

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