Java Lambdas and the Stream API: Bringing Functional Programming to Java

Java Lambdas and the Stream API: Bringing Functional Programming to Java

by James McLaughlin
Released November 2019
Publisher(s): Apress
ISBN: 9781484255940

Read it now on the O’Reilly learning platform with a 10-day free trial.

O’Reilly members get unlimited access to live online training experiences, plus books, videos, and digital content from O’Reilly and nearly 200 trusted publishing partners.

Start your free trial

Video description

Come up to speed with Java functional programming and write effective Java code with less effort using lambdas and the stream API. Make your Java project code more reliable by using the declarative approach provided by these new Java features. Learn how to leverage the updated collections API to facilitate common functional programming patterns such as map/filter/reduce. If you’ve ever stumbled through constructing for loops and while loops, this video will add to your programming toolbox and allow you to leave such heavy lifting to the stream API.

You’ll begin your journey with the syntax of Java lambdas, what they are, and how to use them. You will then be introduced to Java streams and the various ways of creating them for the purpose of processing data. You will also learn about the updates which have been made to the Java collections API for supporting streams. Along the way you will be taught the streams API and how to use the methods defined in the Stream class to process data sources to obtain the results you desire by employing lambdas with the Stream class’ operations. 

What You Will Learn
  • Write functional interfaces for defining lambdas
  • Master lambda syntax for implementing anonymous functions
  • Create streams associated with data sources
  • Process data through stream operations
  • Use method references for simplifying lambda expressions
  • Discover parallel and sequential streams and how they differ

Who This Video Is For

Software developers familiar with Java who wish to employ functional programming techniques in their software projects in order to write reliable, compact, and easy-to-read Java code.

Publisher resources

Download Example Code

Table of contents

  1. Overview 00:01:42
  2. Design of Functional Interfaces 00:04:40
  3. Lambda Syntax 00:07:11
  4. Stream Processing 00:07:07
  5. Creating Streams 00:04:54
  6. Collectors 00:06:08
  7. Filter / Map / Reduce 00:13:24
  8. forEach 00:05:18
  9. Method References 00:05:17
  10. Sequential vs Parallel Streams 00:05:24

Product information

  • Title: Java Lambdas and the Stream API: Bringing Functional Programming to Java
  • Author(s): James McLaughlin
  • Release date: November 2019
  • Publisher(s): Apress
  • ISBN: 9781484255940