JAVA 9.0 To 13.0 New Features

Java’s evolution is easiest to follow when each release is considered in context. In JAVA 9.0 To 13.0 New Features, Java trainer Mandar Jog walks through selected changes from JDK 9 to JDK 13, pairing explanations of the platform’s development with examples of the features introduced along the way.

Rather than treating every release as an isolated list, the book also considers what those changes mean for existing code: how to explore newer APIs, work with modular applications, and approach migration from pre-Java 9 projects.

Follow the changes release by release

The early chapters introduce Java’s versioning history before turning to the Java Platform Module System and updates associated with JDK 9 and JDK 10. The discussion continues into JDK 11, including topics such as nest-based access control, the HTTP client, and garbage-collection options.

Put the concepts to work in code

Examples support the explanations throughout. Dedicated coverage of JShell shows how to try code snippets without building a complete application first, while migration material addresses tools and configuration options relevant to older Java code. Later chapters take up selected changes from JDK 12 and 13, including switch expressions, text blocks, and garbage-collection updates.

Explore reactive programming, too

Java’s release features are only part of the book’s scope. A separate section introduces reactive programming and its vocabulary, including publishers, subscribers, subscriptions, processors, and backpressure. This gives readers a way to connect Java’s Flow API with the broader publisher–subscriber model.

A focused reference for Java developers

Readers should already have some familiarity with Java; the book is intended to explain developments from JDK 9 through JDK 13 rather than teach programming from the beginning. Its release-by-release structure makes it useful for revisiting this particular stretch of Java’s history or orienting yourself among its major concepts.

Note: The coverage ends with JDK 13, so later Java releases are outside its scope.