Mastering Lambdas: Java Programming in a Multicore World

Name: Mastering Lambdas: Java Programming in a Multicore World
ISBN: 9787302405535

Maurice NaftalinTsinghua University Press2015

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Word count: 181 words
Chapters: 7
ISBN: 9787302405535

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Summary

Mastering Lambdas: Java Programming in a Multicore World is a systematic guide to the lambda-related features of Java SE 8; the original title is Mastering Lambdas: Java Programming in a Multicore World. The book has seven chapters and is built around the fundamental question "why introduce lambdas at all": with multicore processors now mainstream hardware, Java needed a programming approach better suited to parallel computing, and lambda expressions and the Stream API are at the heart of that shift. The book first sets out the overall context of Java 8's new features, then explains lambda expression syntax and functional interfaces, before going deep into streams and pipelines: intermediate operations, terminal operations, collectors and reductions, ways to create streams, and Spliterator, the Fork/Join framework, and exception handling. Stream performance gets a chapter of its own, with the author arguing for microbenchmarks such as JMH rather than judging performance by feel. The final part covers default methods and how they let APIs evolve without breaking binary compatibility. The book includes complete code examples and is compact, suited to developers with a Java foundation who want to master lambdas and stream processing systematically.

Editor's review

很多讲Java 8的书都把lambda当成语法糖来教，学完只记住几个箭头和双冒号。《精通lambda表达式》不一样：它从"多核硬件逼着语言变"这条主线讲起，先把为什么要变说清楚，再讲怎么变。作者Maurice Naftalin长期与Oracle团队合作维护Java 8新特性相关的教学网站，对语言的边界细节有第一手的把握。体现在书中，就是对函数式接口的@FunctionalInterface约束、类型推断、流的惰性求值、Spliterator切分规则这些容易被讲含糊的地方，都给出了精确表述。全书中文版不到220页、18万字出头，却有完整的理论脉络和示例代码，属于"薄而扎实"的那一类。译者张龙的译文保持技术书的简洁感。唯一的提醒是：书中示例基于Java 8，若你正在用Java 17/21，需要自行对照新API与records、switch模式匹配等演进，但lambda与流的底层原理没有过时。

Who it's for

A good fit for

已掌握Java基本语法与集合 API、准备系统学习 Java 8 新特性的开发者
需要在项目中用 Stream 重构遗留循环代码、并关心性能的中级工程师
对并行流、Fork/Join 与 Spliterator 实现机制感兴趣的读者
想补上课本里讲得不细的函数式接口与默认方法知识的 Java 程序员

Not a good fit for

完全零基础、尚未掌握类、接口与泛型的编程新手
只想找一本 Java 入门教材、期望学习变量与面向对象基础的读者
寻找 Java 17/21 新语法（record、模式匹配）系统讲解的读者

Reading tips

先读完第1章"为何需要 lambda"与第2章语法，再进入流的内容，避免只记住 API 而不理解设计动机。
每章示例务必自己敲一遍；流的具体行为（调试、求值时机）只有在运行时才能看清。
第6、7章涉及性能与基准测试，建议配合 JMH 亲自跑一遍，不要凭直觉判断并行快慢。
读完可与《Java 8 函数式编程》（Warburton）对读：后者重实践与设计模式，本书更重原理与规范细节。

About the publisher

Tsinghua University Press China · Founded in 1980

Founded in 1980, Tsinghua University Press has 57 titles in our collection, covering popular science, medicine, health, law, philosophy and social sciences. Representative works include medical popular-science books such as Cancer Truth: Doctors Are Reading It Too and New Knowledge on Cancer by Bo Luo (Li Zhizhong), legal titles such as Sunshine Is the Best Preservative: Express Delivery of Major Global Anti-Corruption Cases, and works like Qi Ge's A Brief History of Philosophy with Big Ideas and Liu Yunhao's From the Internet to a New Industrial Revolution. Its authors include science writers, medical researchers, the Renmin University of China anti-corruption master's class and university scholars, reflecting a publishing profile that balances academic seriousness with accessible reading. As public information is limited, this profile is based only on the titles in our collection.

Chapter 1 Introduction
Chapter 2 Lambda Expression Basics
Chapter 3 Getting Started with Streams and Pipelines
Chapter 4 Collections and Reduction
Chapter 5 Creating Streams
Chapter 6 Spliterators, the Fork/Join Framework, and Exceptions
Chapter 7 Stream Performance and Default Methods

FAQ

这本书和《Java 8 函数式编程》是同一本吗？

不是。本书原版为 Maurice Naftalin 的 Mastering Lambdas，清华大学出版社 2015 年出版，张龙译；《Java 8 函数式编程》是 Richard Warburton 所著、王群锋译、人民邮电出版社出版，两本书主题相近但作者与内容不同。

书里的代码示例用的是哪个 Java 版本？

示例针对 Java SE 8（JDK 8）。在 Java 11、17 及以后版本中 lambda 与 Stream API 的语法和语义基本一致，但部分 API 有增补或调整，阅读时对照官方文档即可。

需要先学过多线程才能读懂吗？

不必须，但有限的并发基础会有帮助。书中讲并行流、Fork/Join 与 Spliterator 时会用到并发概念，建议先了解线程、任务切分的基本思路。

全书的篇幅大概多少，多久能读完？

中文版约 216 页、18.1 万字，分 7 章。有 Java 基础的读者按每天一章加练习，通常一到两周可读完并动手实践。

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