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 book here: http://manning.com/urma/ or on Amazon

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

Chapter 1: Java 8: why should you care?
Chapter 2: Passing code with behavior parameterization
Chapter 3: Lambda expressions
Chapter 4: Working with Streams
Chapter 5: Processing data with streams
Chapter 6: Collecting data with streams
Chapter 7: Parallel data processing and performance
Chapter 8: Refactoring, testing, debugging
Chapter 9: Default methods
Chapter 10: Using Optional as a better alternative to null
Chapter 11: CompletableFuture: composable asynchronous programming
Chapter 12: New Date and Time API
Chapter 13: Thinking functionally
Chapter 14: Functional programming techniques
Chapter 15: Blending OOP and FP: comparing Java 8 and Scala
Chapter 16: Conclusions and "where next" for Java
Appendix A: Miscellaneous language updates
Appendix B: Miscellaneous library updates
Appendix C: Performing multiple operations in parallel on a Stream
Appendix D: Lambdas and JVM bytecode We will update the repository as we update the book. Stay tuned!

Make sure to have JDK8 installed

The latest binary can be found here: http://www.oracle.com/technetwork/java/javase/overview/java8-2100321.html

$ java -version

java version "1.8.0_05" Java(TM) SE Runtime Environment (build 1.8.0_05-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, 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

You can also import the project in your favorite IDE:

In IntelliJ use "File->Open" menu and navigate to the folder where the project resides
In Eclipse use "File->Import->Existing Maven Projects" (also modify "Reduntant super interfaces" to report as Warnings instead of Errors
In Netbeans use "File->Open Project" menu