About the Book

Every new version of Java is important, but Java 8 is a game changer. Java 8 in Action is a clearly written guide to the new features of Java 8. It begins with a practical introduction to lambdas, using real-world Java code. Next, it covers the new Streams API and shows how you can use it to make collection-based code radically easier to understand and maintain. It also explains other major Java 8 features including default methods, Optional, CompletableFuture, and the new Date and Time API.

This book is written for programmers familiar with Java and basic OO programming.

What's Inside

• How to use Java 8's powerful new features
• Writing effective multicore-ready applications
• Refactoring, testing, and debugging
• Adopting functional-style programming
• Quizzes and quick-check questions

About the Authors

Raoul-Gabriel Urma is a software engineer, speaker, trainer, and PhD candidate at the University of Cambridge. Mario Fusco is an engineer at Red Hat and creator of the lambdaj library. Alan Mycroft is a professor at Cambridge and cofounder of the Raspberry Pi Foundation.

Table of Contents

PART 1 FUNDAMENTALS

1. Java 8: why should you care?
2. Passing code with behavior parameterization
3. Lambda expressions

PART 2 FUNCTIONAL-STYLE DATA PROCESSING

4. Introducing streams
5. Working with streams
6. Collecting data with streams
7. Parallel data processing and performance

   PART 3 EFFECTIVE JAVA 8 PROGRAMMING

8. Refactoring, testing, and debugging
9. Default methods
10. Using Optional as a better alternative to null
11. CompletableFuture: composable asynchronousprogramming
12. New Date and Time API

PART 4 BEYOND JAVA 8

13. Thinking functionally
14. Functional programming techniques
15. Blending OOP and FP: comparing Java 8 and Scala
16. Conclusions and where next for Java

APPENDIXES

17. Miscellaneous language updates
18. Miscellaneous library updates
19. Performing multiple operations in parallelon a stream
20. Lambdas and JVM bytecode