Functional Programming in Java

Summary

Functional 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 Technology

Here'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 Book

Functional 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 Reader

Written for Java developers with no previous FP experience.

About the Author

Pierre-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

1. What is functional programming?
2. Using functions in Java
3. Making Java more functional
4. Recursion, corecursion, and memoization
5. Data handling with lists
6. Dealing with optional data
7. Handling errors and exceptions
8. Advanced list handling
9. Working with laziness
10. More data handling with trees
11. Solving real problems with advanced trees
12. Handling state mutation in a functional way
13. Functional input/output
14. Sharing mutable state with actors
15. Solving common problems functionally

Autorentext

Pierre-Yves Saumont is an R&D software engineer at Alcatel-Lucent Submarine Networks. He wrote Le guide du developpeur Java (1999), the first French book published on Java programming.

Klappentext

KEY FEATURES

• Increases productivity

• Easy to grasp examples and illustrations

• Written for professional Java developers

AUDIENCE

Readers need to be comfortable with Java programming. No previous

experience with functional programming is required.

Zusammenfassung
DESCRIPTION

Functional programming is a deep and potentially mind-bending

discipline. Fortunately, Java developers don't have to master every

aspect of FP to get a big boost in the performance, readability, and

maintainability of their applications. By learning a few core FP

principles, they can write code that's less prone to side effects and

unwanted dependencies and which is much better suited to the parallel

processing required by modern multi-core and distributed systems. Also,

because units of functional code are designed to be modular and

independent, FP reduces or eliminates many of the bugs development

teams routinely face when managing a large codebase.

Functional Programming in Java teaches Java developers how to

incorporate the most powerful benefits of functional programming into

new and existing Java code. Written to meet the needs of professional

Java developers who want to introduce functional programming

principles into new and legacy projects, this book uses examples,

exercises, and illustrations to teach core FP principles such as referential

transparency, immutability, persistence, and laziness. They’ll discover

which of the new functionally-inspired features of Java 8 will help in

applying FP principles to code—as well as which to avoid. In the end,

they’ll be able to think functionally about coding tasks in Java and use

FP to make their applications easier to understand, optimize, maintain,

and scale.

KEY FEATURES

• Increases productivity

• Easy to grasp examples and illustrations

• Written for professional Java developers

AUDIENCE

Readers need to be comfortable with Java programming. No previous

experience with functional programming is required.

ABOUT THE TECHNOLOGY

Functional programming is gaining momentum, mainly through adoption of

new languages such as Scala, Clojure or Groovy, and through the new

popularity of older languages such as Haskell or Erlang. And functional

programming is coming to Java 8 with the addition of features such as

lambda expressions, and Streams.