SummaryFunctional Programming in Java teaches Java developers how to incorporate the most powerful benefits of functional programming into new and existing Java code. You'll learn to think functionally about coding tasks in Java and use FP to make your applications easier to understand, optimize, maintain, and scale. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications.About the TechnologyHere's a bold statement: learn functional programming and you'll be a better Java developer. Fortunately, you don't have to master every aspect of FP to get a big payoff. If you take in a few core principles, you'll see an immediate boost in the scalability, readability, and maintainability of your code. And did we mention that you'll have fewer bugs? Let's get started!About the BookFunctional Programming in Java teaches you how to incorporate the powerful benefits of functional programming into new and existing Java code. This book uses easy-to-grasp examples, exercises, and illustrations to teach core FP principles such as referential transparency, immutability, persistence, and laziness. Along the way, you'll discover which of the new functionally inspired features of Java 8 will help you most.What's Inside

• Writing code that's easier to read and reason about
• Safer concurrent and parallel programming
• Handling errors without exceptions
• Java 8 features like lambdas, method references, and functional interfaces

About the ReaderWritten for Java developers with no previous FP experience.About the AuthorPierre-Yves Saumont is a seasoned Java developer with three decades of experience designing and building enterprise software. He is an R&D engineer at Alcatel-Lucent Submarine Networks.Table of Contents

What is functional programming?

Using functions in Java

Making Java more functional

Recursion, corecursion, and memoization

Data handling with lists

Dealing with optional data

Handling errors and exceptions

Advanced list handling

Working with laziness

More data handling with trees

Solving real problems with advanced trees

Handling state mutation in a functional way

Functional input/output

Sharing mutable state with actors

Solving common problems functionally