SummaryJava 8 in Action is a clearly written guide to the new features of Java 8. The book covers lambdas, streams, and functional-style programming. With Java 8's functional features you can now write more concise code in less time, and also automatically benefit from multicore architectures. It's time to dig in!Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications.About the BookEvery new version of Java is important, but Java 8 is a game changer. Java 8 in Action is a clearly written guide to the new features of Java 8. It begins with a practical introduction to lambdas, using real-world Java code. Next, it covers the new Streams API and shows how you can use it to make collection-based code radically easier to understand and maintain. It also explains other major Java 8 features including default methods, Optional, CompletableFuture, and the new Date and Time API. This book is written for programmers familiar with Java and basic OO programming. What's InsideHow to use Java 8's powerful new featuresWriting effective multicore-ready applicationsRefactoring, testing, and debuggingAdopting functional-style programmingQuizzes and quick-check questionsAbout the AuthorsRaoul-Gabriel Urma is a software engineer, speaker, trainer, and PhD candidate at the University of Cambridge. Mario Fusco is an engineer at Red Hat and creator of the lambdaj library. Alan Mycroft is a professor at Cambridge and cofounder of the Raspberry Pi Foundation.Table of ContentsPART 1 FUNDAMENTALSJava 8: why should you care?Passing code with behavior parameterizationLambda expressionsPART 2 FUNCTIONAL-STYLE DATA PROCESSINGIntroducing streamsWorking with streamsCollecting data with streamsParallel data processing and performancePART 3 EFFECTIVE JAVA 8 PROGRAMMINGRefactoring, testing, and debuggingDefault methods Using Optional as a better alternative to null CompletableFuture: composable asynchronousprogrammingNew Date and Time APIPART 4 BEYOND JAVA 8Thinking functionallyFunctional programming techniquesBlending OOP and FP: comparing Java 8 and Scala Conclusions and where next for JavaAPPENDIXESMiscellaneous language updatesMiscellaneous library updatesPerforming multiple operations in parallelon a streamLambdas and JVM bytecode