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