Java 8 in Action

"Java 8 in Action" offers a clear and practical guide to the new features introduced in Java 8, including lambdas, the Streams API, default methods, Optional, CompletableFuture, and the Date and Time API. Designed for programmers familiar with Java, the book demonstrates how these features can simplify code, improve performance on multicore architectures, and support functional-style programming. It also covers techniques for refactoring, testing, and debugging Java applications with the updated language tools.