The Java Module System

Nicolai Parlog
Foreword by Kevlin Henney
  • June 2019
  • ISBN 9781617294280
  • 440 pages
  • printed in black & white

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Nicolai’s care and attention to detail allow you to take advantage of the distillation of his knowledge—from theory to practice, from entry level to advanced.

From the Foreword by Kevlin Henney
Look inside

Java's much-awaited "Project Jigsaw" is finally here! Java 11 includes a built-in modularity framework, and The Java Module System is your guide to discovering it. In this new book, you'll learn how the module system improves reliability and maintainability, and how it can be used to reduce tight coupling of system components.

about the technology

Packaging code into neat, well-defined units makes it easier to deliver safe and reliable applications. The Java Platform Module System is a language standard for creating these units. With modules, you can closely control how JARs interact and easily identify any missing dependencies at startup. This shift in design is so fundamental that starting with Java 9, all core Java APIs are distributed as modules, and libraries, frameworks, and applications will benefit from doing the same.

about the book

The Java Module System is your in-depth guide to creating and using Java modules. With detailed examples and easy-to-understand diagrams, you’ll learn the anatomy of a modular Java application. Along the way, you’ll master best practices for designing with modules, debugging your modular app, and deploying to production.

what's inside

  • The anatomy of a modular Java app
  • Building modules from source to JAR
  • Migrating to modular Java
  • Decoupling dependencies and refining APIs
  • Handling reflection and versioning
  • Customizing runtime images
  • Updated for Java 11

about the reader

Perfect for developers with some Java experience.

about the author

Nicolai Parlog is a developer, author, speaker, and trainer. His home is codefx.org.

We interviewed Nicolai as a part of our Six Questions series. Check it out here.

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A great introduction to modules in general, and Java 11 modules in particular.

Mikkel Arentoft, Danske Bank

A clear and concise introduction to Java’s long-awaited module system.

Jim Wright, Sword Apak

If you are serious about Java 11, you will need this book!

Christian Kreutzer-Beck, ARAG Italy
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