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Java8InAction

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!

Make sure to have JDK8 installed

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/

Compile/Run the examples

Using maven:

$ mvn compile

$ cd target/classes

$ java lambdasinaction/chap1/FilteringApples

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