Modern Java in Action

Manning's bestselling Java 8 book has been revised for Java 9! In Java 8 and 9 in Action, you'll build on your existing Java language skills with the newest features and techniques. After a practical introduction to lambdas using real-world Java code, you'll dive into the Streams API. Next, you'll discover event-driven reactive programming and see how the Java Module System (aka Jigsaw) will help change how you structure your code. This book also explains functional programming in Java, working with collections, and more.
"This is an excellent introduction to the newest features in Java 8 and 9. It provides clear and concise examples to help clarify how to use Java's newest features such as streams, lambda functions, and reactive streams."
~ Meredith Godar
"Hands on Java 8 and 9, simple and elegantly explained."
~ Deepak Bhaskaran