Modular Programming in Java 9

Kick-start your modular programming journey and gear up for the future of Java developmentAbout This BookMaster design patterns and best practices to build truly modular applications in Java 9Upgrade your old Java code to Java 9 with easeBuild and run a smooth functioning multi-module application.Who This Book Is ForThis book is written for Java developers who are interested in learning and understanding the techniques and best practices to build modular applications in Java. The book assumes some previous programming experience in Java 8 or earlier, familiarity with the basic Java types such as classes and interfaces, as well as experience in compiling and executing Java programs.What You Will LearnGet introduced to the concept of modules and modular programming by working on a fully modular Java applicationBuild and configure your own Java 9 modulesWork with multiple modules and establish inter-module dependenciesUnderstand and use the principles of encapsulation, readability, and accessibilityUse jlink to generate fully loaded custom runtime images like a proDiscover the best practices to help you write awesome modules that are a joy to use and maintainUpgrade your old Java code to use the new Java 9 module systemIn DetailThe 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.Style and ApproachThe book is a step-by-step guide to understanding Modularity and building a complete application using a modular design.