The Java Module System

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Summary

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.

Foreword by Kevlin Henney.

Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. You'll find registration instructions inside the print book.

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.

Table of Contents

    PART 1 - Hello, modules
  1. First piece of the puzzle
  2. Anatomy of a modular application
  3. Defining modules and their properties
  4. Building modules from source to JAR
  5. Running and debugging modular applications
  6. PART 2 - Adapting real-world projects
  7. Compatibility challenges when moving to Java 9 or later
  8. Recurring challenges when running on Java 9 or later
  9. Incremental modularization of existing projects
  10. Migration and modularization strategies
  11. PART 3 - Advanced module system features
  12. Using services to decouple modules
  13. Refining dependencies and APIs
  14. Reflection in a modular world
  15. Module versions: What's possible and what's not
  16. Customizing runtime images with jlink
  17. Putting the pieces together
Manning Publications