This repository contains all the source code for the examples and quizzes in the book Java 8 in Action: Lambdas, Streams and functional-style programming.

You can purchase the early access here: http://manning.com/urma/

We are very keen to hear your feedback and improve the book based on your comments!

The source code for all examples can be found in the directory src/main/java/lambdasinaction

• Chapter 1: Introduction
• Chapter 2: Passing Code/Behaviour Parameterisation
• Chapter 3: Lambda expressions
• Chapter 4: Streams
• Chapter 5: Collectors
• Chapter 6: Parallel streams and performance
• Chapter 7: Tools, testing, debugging
• Chapter 8: Default methods
• Chapter 9: Optional: a better alternative to null
• Chapter 10: CompletableFuture: composable asynchronous programming

We will update the repository as we update the book. Stay tuned!

For example:

$ java -version

java version "1.8.0-ea"

Java(TM) SE Runtime Environment (build 1.8.0-ea-lambda-nightly-h109-20130902-b106-b00)

Java HotSpot(TM) 64-Bit Server VM (build 25.0-b45, mixed mode)

You can download a preview version here: https://jdk8.java.net/

Using maven:

$ mvn compile

$ cd target/classes

$ java lambdasinaction/chap1/FilteringApples

Alternatively you can compile the files manually inside the directory src/main/java