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

Collecting garbage with the new Java platform


Java came out of the gate with automatic garbage collection, making it a development platform of choice for many programmers. It was commonplace to want to avoid manual memory management in other programming languages. We have looked in-depth at the garbage collection system to include the various approaches, or algorithms, used by the JVM. Java 9 includes some relevant changes to the garbage collection system and was the focus of three Java Enhancement Program (JEP) issues. Those issues are listed here:

  • Default garbage collection (JEP 248)
  • Depreciated garbage collection combinations (JEP 214)
  • Unified garbage collection logging (JEP 271)

We will review each one of these garbage collection concepts and their corresponding Java Enhancement Plan (JEP) issue in the following sections.

Default garbage collection

We previously detailed the following garbage collection approaches used by the JVM prior to Java 9. These are still plausible garbage collection...