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Modular Programming in Java 9

You're reading from   Modular Programming in Java 9 Build large scale applications using Java modularity and Project Jigsaw

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Product type Paperback
Published in Aug 2017
Publisher Packt
ISBN-13 9781787126909
Length 298 pages
Edition 1st Edition
Languages
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Author (1):
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Koushik Srinivas Kothagal Koushik Srinivas Kothagal
Author Profile Icon Koushik Srinivas Kothagal
Koushik Srinivas Kothagal
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Table of Contents (13) Chapters Close

Preface 1. Introducing Java 9 Modularity 2. Creating Your First Java Module FREE CHAPTER 3. Handling Inter-Module Dependencies 4. Introducing the Modular JDK 5. Using Platform APIs 6. Module Resolution, Readability, and Accessibility 7. Introducing Services 8. Understanding Linking and Using jlink 9. Module Design Patterns and Strategies 10. Preparing Your Code for Java 9 11. Migrating Your Code to Java 9 12. Using Build Tools and Testing Java Modules

The problem of coupling

The phrase tight coupling in programming is referred to situations where two entities are so highly dependent on each other that in order to change either of their behavior or relationship, it is required to make actual code changes to one (or often both) of those entities. The term loose coupling, on the other hand, refers to the opposite scenario--entities that are not highly dependent. In such cases, entities ideally don't even know about each other's existence, but can still be made to interact with each other.

With that in mind, what would you say the coupling of two modules in the Java module system could be called? When one module depends on another, are the two modules tightly coupled or loosely coupled? The answer is obviously that they are tightly coupled. Think of the following facts that apply to module relationships:

  • Modules need...
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