April 2017
Beginner
504 pages
14h 11m
English
Content preview from Java 9 Programming By Example
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Why modules are needed
We have already seen that there are four levels of access in Java. A method or field can be private, protected, public, or default (also known as package private) when no modifier is supplied. When you develop a complex library to be used in several projects, the library itself will contain many classes in many packages. There will certainly be classes and methods, fields in those that are used inside the library by other classes from different packages, but classes that are not to be used by the code outside the library. Making them anything less visible than public will render them unusable inside the library. Making them public will make them visible from outside.
In our code, the Maven module quick compiled to a ...
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