A Practical Guide for Java 8 Lambdas and… [PDF/iPad/Kindle]

This book is not the first book about Java 8 lambda expressions and streams, and it's definitely not the last book about lambda expressions and streams. Java 8 is a Java platform upgrade which the community looking forward to for a long time. Lambda expressions and streams quickly gain popularity in Java developers. There are already a lot of books and online tutorials about lambda expressions and streams. This book is trying to explain lambda expressions and streams from a different perspective.

For lambda expressions, this book explains in details based on JSR 335.
For streams, this book covers fundamental concepts of Java core library.
This book provides how-to examples for lambda expressions and streams.
This book also covers the important utility class Optional.

Lambda expressions and streams are easy to understand and use. This book tries to provide some insights about how to use them efficiently.

1.Introduction

2.Lambda expressions

2.1Start a thread - A simple example
2.2Functional interfaces
Functional interfaces and single responsibility principle
2.3Target typing
Standalone expressions and Poly expressions
2.4Lambda expressions
2.5Lexical scoping
2.6Effectively final local variables
2.7Method references
2.7.1Types of method references
2.8Default interface methods
2.8.1Static interface methods

3.Functional interfaces

3.1Functions
3.1.1Function
3.1.2BiFunction
3.1.3Function and BiFunction with predefined types
3.2Consumers
3.2.1Consumer
3.2.2BiConsumer
3.2.3Consumer with predefined types
3.2.4Example of using Consumer
3.3Suppliers
3.3.1Supplier
3.3.2Supplier with predefined types
3.4Predicates
3.4.1Predicate
3.4.2BiPredicate
3.4.3Predicate and BiPredicate with predefined types
3.5Operators
3.5.1UnaryOperator
3.5.2BinaryOperator
3.5.3Operators with predefined types

4.Streams

4.1User-specified behavior
4.2Basic stream concepts
4.2.1Sequential or parallel
4.2.2Encounter order
4.3Stream operation characteristics
4.3.1Stateful or stateless
4.4Stream
4.5Spliterator
4.5.1Spliterator characteristics
4.5.2Spliterators for primitive types
4.5.3Spliterators to create Spliterators
4.5.4Late-binding and fail-fast
4.6BaseStream
4.7StreamSource
4.8Stream static methods
4.9Stream sources
4.9.1Arrays
4.9.2Collections
4.9.3Stream builder
4.9.4I/O channels
4.9.4.1lines
4.9.4.2list
4.9.4.3walk
4.9.4.4find
4.10Examples for stream processing
4.11Stream intermediate operations
4.11.1map
4.11.2flatMap
4.11.3filter
4.11.4distinct
4.11.5limit
4.11.6skip
4.11.7sorted
4.11.8peek
4.11.9Operations chaining
4.12Stream terminal operations
4.12.1forEach and forEachOrdered
4.12.2reduce
4.12.3max and min
4.12.4match
4.12.5find
4.12.6toArray
4.12.7collect
4.12.8Collectors
4.12.8.1Collect into collections
4.12.8.2groupingBy
4.12.8.3joining
4.12.8.4mapping
4.12.8.5partitioningBy
4.12.8.6counting
4.12.8.7averaging
4.12.8.8summing
4.12.8.9maxBy and minBy
4.12.8.10summarizing
4.12.8.11collectingAndThen
4.12.8.12reducing
4.12.9Parallel stream
4.12.9.1Parallel reduction
4.13How-tos
4.13.1How to convert a Collection to a Map?
4.13.2How to filter map entries by keys?
4.13.3How to filter map entries by values?
4.13.4How to group elements by multiple conditions?
4.13.5How to combine multiple collections into a stream?
4.13.6How to convert a stream to another stream with different type?
4.13.7How to find an element in the stream?
4.13.8How to sort map entries?
4.13.9How to do multiple operations on a stream?
4.13.10How to count elements after grouping?
4.13.11Exceptions Handling in Streams

5.Optional

5.1What’s Optional
5.2Usage of Optional
5.2.1Simple usage
5.2.2Chained usage
5.2.3Functional usage
5.3How-tos
5.3.1How to interact with legacy library code before Optional?
5.3.2How to get value from chained Optional reference path?
5.3.3How to get first value of a list of Optionals?
5.3.4How to chain method invocations with return value of Optional objects in sequence?
5.3.5How to convert an Optional object to a stream?
5.3.6How to use Optional to check for null and assign default values?
5.4Updates after Java 8

The Leanpub 60 Day 100% Happiness Guarantee

Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.

Now, this is technically risky for us, since you'll have the book or course files either way. But we're so confident in our products and services, and in our authors and readers, that we're happy to offer a full money back guarantee for everything we sell.

You can only find out how good something is by trying it, and because of our 100% money back guarantee there's literally no risk to do so!

So, there's no reason not to click the Add to Cart button, is there?

See full terms...

Earn $8 on a $10 Purchase, and $16 on a $20 Purchase

We pay 80% royalties on purchases of $7.99 or more, and 80% royalties minus a 50 cent flat fee on purchases between $0.99 and $7.98. You earn $8 on a $10 sale, and $16 on a $20 sale. So, if we sell 5000 non-refunded copies of your book for $20, you'll earn $80,000.

(Yes, some authors have already earned much more than that on Leanpub.)

In fact, authors have earned over $14 million writing, publishing and selling on Leanpub.

Learn more about writing on Leanpub

Free Updates. DRM Free.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Write and Publish on Leanpub

You can use Leanpub to easily write, publish and sell in-progress and completed ebooks and online courses!

Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks.

Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. (Or, if you are producing your ebook your own way, you can even upload your own PDF and/or EPUB files and then publish with one click!) It really is that easy.

Learn more about writing on Leanpub

A Practical Guide for Java 8 Lambdas and Streams

About

Share this book

Categories

Feedback

Price

You pay

Author earns

...Or Buy With Credits!

Number of credits (Minimum 1)

Team Discounts

Author

Contents