Book Image

Java 9: Building Robust Modular Applications

By : Dr. Edward Lavieri, Peter Verhas, Jason Lee
Book Image

Java 9: Building Robust Modular Applications

By: Dr. Edward Lavieri, Peter Verhas, Jason Lee

Overview of this book

Java 9 and its new features add to the richness of the language; Java is one of the languages most used by developers to build robust software applications. Java 9 comes with a special emphasis on modularity with its integration with Jigsaw. This course is your one-stop guide to mastering the language. You'll be provided with an overview and explanation of the new features introduced in Java 9 and the importance of the new APIs and enhancements. Some new features of Java 9 are ground-breaking; if you are an experienced programmer, you will be able to make your enterprise applications leaner by learning these new features. You'll be provided with practical guidance in applying your newly acquired knowledge of Java 9 and further information on future developments of the Java platform. This course will improve your productivity, making your applications faster. Next, you'll go on to implement everything you've learned by building 10 cool projects. You will learn to build an email filter that separates spam messages from all your inboxes, a social media aggregator app that will help you efficiently track various feeds, and a microservice for a client/server note application, to name just a few. By the end of this course, you will be well acquainted with Java 9 features and able to build your own applications and projects. This Learning Path contains the best content from the following two recently published Packt products: • Mastering Java 9 • Java 9 Programming Blueprints
Table of Contents (33 chapters)
Title Page - Courses
Packt Upsell - Courses
Preface
25
Taking Notes with Monumentum
Bibliography
Index

Reviewing Java's platform module system [JEP-200]


The core aim of JEP-200 was to modularize the Java Development Kit (JDK) using the Java Platform Module System (JPMS). Prior to Java 9, our familiarity with the JDK includes awareness of its major components:

  • Java runtime environment (JRE)
  • The interpreter (java)
  • Compiler (javac)
  • The archiver (jar)
  • Document generator (javadoc)

The task of modularizing the JDK was to break it into components that could be combined at compile time or runtime. The modular structure is based on the following modular profiles established as compact profiles in Java 8. Each of the three profiles is detailed in the following tables:

Compact profile 1:

java.io

java.lang.annotation

java.lang.invoke

java.lang.ref

lava.lang.reflect

java.math

java.net

java.nio

java.nio.channels

java.nio.channels.spi

java.nio.charset

java.nio.charset.spi

java.nio.file

java.nio.file.attribute

java.nio.file.spi

java.security

java.security.cert

java.security.interfaces

java.security.spec

java.text

java.text.spi

java...