Modern Java in Action (Lambdas, streams, functional and reactive programming) - Raoul-Gabriel Urma a kol.

Manning's bestselling Java 8 book has been revised for Java 9! In Java 8 and 9 in Action, readers build on their existing Java language skills with the newest features and techniques. The release of Java 9 builds on what made Java 8 so exciting. In addition to Java 8's lambdas and streams, Java 9 adds a host of new features of its own. It includes new library features to support reactive programming, which give users new ways of thinking about programming and writing code that is easier to read and maintain.