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Modular Programming in Java 9

Modular Programming in Java 9

By : Kothagal
4.5 (2)
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Modular Programming in Java 9

Modular Programming in Java 9

4.5 (2)
By: Kothagal

Overview of this book

The Java 9 module system is an important addition to the language that affects the way we design, write, and organize code and libraries in Java. It provides a new way to achieve maintainable code by the encapsulation of Java types, as well as a way to write better libraries that have clear interfaces. Effectively using the module system requires an understanding of how modules work and what the best practices of creating modules are. This book will give you step-by-step instructions to create new modules as well as migrate code from earlier versions of Java to the Java 9 module system. You'll be working on a fully modular sample application and add features to it as you learn about Java modules. You'll learn how to create module definitions, setup inter-module dependencies, and use the built-in modules from the modular JDK. You will also learn about module resolution and how to use jlink to generate custom runtime images. We will end our journey by taking a look at the road ahead. You will learn some powerful best practices that will help you as you start building modular applications. You will also learn how to upgrade an existing Java 8 codebase to Java 9, handle issues with libraries, and how to test Java 9 applications.
Table of Contents (13 chapters)
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Module Design Patterns and Strategies

In the previous few chapters, we did a deep dive into several modularity features in Java 9 that enable you to build Java applications with modules. You've learned how to use the dependency declarations and services to establish module dependencies. You've also learned how to use jlink to build modular runtimes that can be distributed. In this chapter, we'll look at a slightly less objective concern--how to build good applications with modules in Java. Now that you've acquired the knowledge to create and use modules, what are the recommended ways to do that? What are the best practices and patterns that you should use? Here's what we'll cover in this chapter:

  • Understanding how to design modules--what a module should ideally be and where module boundaries should be drawn
  • Understanding how to design good APIs for...
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