This book offers a brief introduction, pragmatically approached by FP for Java developers or anyone that uses object-oriented language. Dean Wampler, Java expert and author of the Scala Programming (O'Reilly), showing you how to apply the principles of FP such as eternity, avoiding side effects, and higher-to functionality into your Java code. Once you understand the benefits of functional programming, you will find that it increases all the code you write?. Learn the basic principles of FP and apply it to object-oriented programming Discover how the FP is more concise and modular OOP Get useful lessons from FP to design your Java types such as avoiding nulls data structure and algorithm design using the principles of functional programming Writing? Actor model of concurrent programs using software transactional memory and functional use of libraries and frameworks for Java and learn where to go next to deepen your functional skills programming?