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

Parser API for Nashorn [JEP-236]


The focus of JEP 236 was to create an API for Nashorn's EMCAScript abstract syntax tree. In this section, we will individually look at Nashorn, EMCAScript and then the Parser API.

Nashorn

Oracle Nashorn is a JavaScript engine for the JVM developed in Java by Oracle. It was released with Java 8. It was created to provide developers with a highly efficiently and lightweight JavaScript runtime engine. Using this engine, developers were able to embed JavaScript code in their Java applications. Prior to Java 8, developers had access to the JavaScript engine created by Netscape. That engine, introduced in 1997, was maintained by Mozilla.

Nashorn can be used both as a command-line tool and as an embedded interpreter in Java applications. Let's look at examples of both.

Note

Nashorn is the German word for rhinoceros. The name spawned from the Rhino-named JavaScript engine from the Mozilla Foundation. Rhino is said to have originated from the picture of the animal on a...