Java 8 in Action

JAVA 8 IN ACTION ABOUT THE BOOK  Every new version of Java is important, but Java 8 is a game changer. changer. Java 8 in

Acon is a clearly wrien guide to the new features of Java 8. It begins with a praccal introducon to lambdas, using real-world Java code. Next, it covers the new Streams API and shows how you can use it to make collecon-based code radically easier to understand and maintain. It also explains other major Java 8 features including default methods, Oponal, CompletableFuture, and the new Date and Time API.

FEATURES

 /- ` 5 4 9 /

ISBN: 9789351197430 • Pages: 424

Authors: Raoul-Gabriel Urma, Mario Fusco, and Alan Mycroft

�

How to use Java 8’s powerful new features

�

Wring eecve mulcore-ready applicaons

�

Refactoring, tesng, and debugging

�

Adopng funconal-style programming

�

Quizzes and quick-check quesons

SUMMARY Java 8 in Acon is a clearly wrien guide to the new features of Java 8. The book covers lambdas, streams, and funconal-style programming. With Java 8’s 8’s funconal features you can now write more concise code in less me, and also automacally benet from mulcore architectures. architectures. It’s me to dig in!

ABOUT THE AUTHORS Raoul-Gabriel Urma is Urma is a soware engineer, en gineer, speaker, speaker, trainer, and PhD candidate cand idate Fusco is an engineer at Red Hat and at the University of Cambridge. Mario Fusco is Mycro is a professor at Cambridge and creator of the lambdaj library. Alan Mycro is cofounder of the Raspberry Pi Foundaon. /dtechpress

/dtechpress

/dreamtechpress

dreamtechpress.wordpress.com

/company/dreamtech-press

TABLE OF CONTENTS PART 1 FUNDAMENTALS

PART 3 EFFECTIVE JAVA 8 PROGRAMMING

1

8

2

3

Java 8: Why should you Care? y Why is Java sll changing? y Funcons in Java y Streams y Default methods y Other good ideas from funconal programming Passing code with Behavior Parameterizaon y Coping with changing requirements y Behavior parameterizaon y Tackling verbosity y Real-world examples

Refactoring, Tesng, and Debugging y y y y

9

Default Methods y y y y

Lambda Expressions y Lambdas in a nutshell y Where and how to use lambdas y Pung lambdas into pracce: the execute around paern y Using funconal interfaces y Type checking, type inference, and restricons y Method references y Pung lambdas and method references into pracce! y Useful methods to compose lambda expressions y Similar ideas from mathemacs

4

5

6

7

Evolving APIs Default methods in a nutshell Usage paerns for default methods Resoluon rules

10 Using Oponal as a Beer Alternave to Null y y y y

How do you model the absence of a value? Introducing the Oponal class Paerns for adopng Oponal Praccal examples of using Oponal

11 Completable Future: Composable Asynchronous Programming y y y y

PART 2 FUNCTIONALSTYLE DATA PROCESSING

Refactoring for improved readability and exibility Refactoring object-oriented design paerns with lambdas Tesng lambdas Debugging

y

Futures Implemenng an asynchronous API Make your code non-blocking Pipelining asynchronous tasks Reacng to a CompletableFuture compleon

Introducing streams y What are streams? y Geng started with streams y Streams vs. collecons y Stream operaons y Summary

12 New Date and Time API

Working with Streams y Filtering and slicing y Mapping y Finding and matching y Reducing y Pung it all into pracce y Numeric streams y Building streams

13 Thinking Funconally

y y y

PART 4 BEYOND JAVA y y y

Implemenng and maintaining systems What’s funconal programming? Recursion vs. iteraon

14 Funconal Programming Techniques y y

Collecng Data with Streams y Collectors in a nutshell y Reducing and summarizing y Grouping y Paroning y The Collector interface y Developing your own collector for beer performance Parallel Data Processing and Performance y Parallel streams y The fork/join framework y Spliterator

Published by:

LocalDate, LocalTime, Instant, Duraon, and Period Manipulang, parsing, and formang dates Working with dierent me zones and calendars

y y y

Funcons everywhere Persistent data structures Lazy evaluaon with streams Paern matching Miscellany

15 Blending OOP and FP: Comparing Java 8 and Scala y y y

Introducon to Scala Funcons Classes and traits

16 Conclusions and where Next Next for Java y y

DREAMTECH PRESS

Review of Java 8 features What’s ahead for Java? WILEY INDIA PVT. LTD.

19-A, Ansari Road, Daryaganj New Delhi-110 002, INDIA Tel: Te l: +91-11-2324 3463-73, Fax: +91-11-2324 3078 Email: [email protected] Website: www.dreamtechpre www.dreamtechpress.com ss.com

4435-36/7, Ansari Road, Daryaganj New Delhi-110 002, INDIA Tel: +91-11-4363 0000, Fax: +91-11-2327 5895 Email: [email protected] Website: www.wileyindia.com

Execlusively Distributed by:

Regional Ofces: Bangalore: Tel: +91-80-2313 2383, Fax: +91-80-2312 4319, Email: [email protected] Mumbai: Tel: +91-22-2788 9263, 2788 9272, Telefax: Telefax: +91-22-2788 9263, Email: [email protected] /dtechpress

/dtechpress

/dreamtechpress

dreamtechpress.wordpress.com

/company/dreamtech-press