精通Java 7与多语言编程核心技术

4星 · 超过85%的资源需积分: 10 92 浏览量更新于2024-07-21 收藏 17.59MB PDF 举报

《The Well-Grounded Java Developer (2012.7)》是一本由Benjamin J. Evans和Martijn Verburg合著的专业IT书籍，针对Java 7的关键技术和多语言编程策略进行了深入探讨。该书旨在帮助读者成为全面掌握Java的开发者，书中特别关注了Java内存模型（JMM）的重要规则。 Java内存模型（JMM）是Java并发编程的基础，它定义了线程间共享变量可见性的规则，确保了内存一致性。书中提到的规则包括： 1. **监视器锁操作与同步**：当一个线程对某个monitor进行unlock操作时，这个操作会Synchronize-With后续对该monitor的lock操作，保证了线程之间的相对顺序。 2. **volatile变量的可见性**：写入volatile变量会Synchronize-With后续对该变量的读取，确保不同线程间的数据可见性。 3. **Happens-Before关系**：如果动作A与动作B满足特定条件（如在程序顺序执行中A先于B），则A Happens-Before B。这是Java内存模型中确保一致性的重要概念。 4. **程序顺序中的依赖**：在同一个线程内部，如果操作A在程序顺序上先于操作B，那么A Happens-Before B。通过阅读这本书，读者可以了解到Java 7的新特性以及如何利用这些特性进行高效、并发和安全的编程。同时，书中还可能涉及跨语言编程（Polyglot Programming），即在单一代码库中集成多种编程语言的技术，以提高开发效率和代码复用。《The Well-Grounded Java Developer》不仅适合经验丰富的Java开发者提升技能，也适合那些希望进入Java领域或对并发编程感兴趣的初学者作为参考教材。通过深入学习和实践，读者将能更好地理解和应对现代Java应用程序中的复杂并发挑战。此外，该书还提供了Manning出版社的购买链接和折扣信息，便于读者获取和进一步探索相关知识。

CONTENTS

xiv

12.5 Code metrics with Maven and Jenkins 365

Installing Jenkins plugins 366

■

Making code consistent

with Checkstyle 367

■

Setting the quality bar with FindBugs 369

12.6 Leiningen 372

Getting started with Leiningen 372

■

Leiningen’s

architecture 373

■

Example—Hello Lein 373

REPL-oriented TDD with Leiningen 376

Packaging and deploying with Leiningen 377

12.7 Summary 379

Rapid web development 380

13.1 The problem with Java-based web frameworks 381

Why Java compilation is bad for rapid web development 382

Why static typing is bad for rapid web development 383

13.2 Criteria in selecting a web framework 383

13.3 Getting started with Grails 385

13.4 Grails quick-start project 386

Domain object creation 387

■

Test-driven development 388

Domain object persistence 390

■

Test data creation 391

Controllers 392

■

GSP/JSP views 393

Scaffolding and automatic UI creation 395

Rapid turnaround development 395

13.5 Further Grails exploration 396

Logging 396

■

GORM—object-relational mapping 397

Grails plugins 398

13.6 Getting started with Compojure 399

Hello World with Compojure 399

■

Ring and routes 401

Hiccup 402

13.7 A sample Compojure project—“Am I an Otter or Not?” 403

Setting up “Am I an Otter” 404

■

Core functions in

“Am I an Otter” 406

13.8 Summary 409

Staying well-grounded 410

14.1 What to expect in Java 8 411

Lambdas (a.k.a. closures) 411

Modularization (a.k.a. Jigsaw) 413

FOREWORD

xviii

the time. This book shows you how to think about divide-and-conquer and how to

avoid some of the safety flaws.

When I saw the chapter on classloading, I thought they had gone a bit too far. Here

were the tricks that my friends and I had used to create magical code, laid bare for all to

learn! They explain how

javap

works, a little tool that can give you insight into the byte-

code generated by the Java compiler. They also cover the new

invokedynamic

and

explain how it differs from plain reflection.

One chapter that I particularly like is “Understanding performance tuning.” This

is the first book since Jack Shirazi’s Java Performance Tuning that has captured the

essence of how to make your system faster. I can summarize the chapter in three

words: “Measure, don’t guess.” This is the essence of good performance tuning. It’s

impossible for a human to guess which code is slow. Instead of offering a single coding

trick, this chapter explains performance from a hardware perspective. It also shows

you how to measure the performance. An interesting little benchmark tool is their

CacheTester

class, which shows the cost of cache misses.

Part 3 of the book explains polyglot programming on the

JVM

. Java is so much more

than a Java programming language. It’s also a platform on which other languages can run.

We’ve seen an explosion of different types of languages. Some are functional, some are

declarative. Some are ports (Jython and

uby), allowing other languages to run on the

JVM

. Languages can be dynamic (Groovy) or stable (Java and Scala). There are many

reasons to use a non-Java language on the

JVM

. If you’re starting a new project, look at

what’s available before deciding. You might save yourself a lot of boilerplate code.

Ben and Martijn show us three alternative languages: Groovy, Scala, and Clojure. In

my opinion, these are the most viable languages at the moment. The authors describe

the differences between these languages, how they compare to Java, and their special

features. The chapter on each language is just enough to help you figure out which you

should be using, without too much technical detail. Don’t expect a reference manual to

Groovy; do expect insight on which language is the right one for you.

Next, you’ll gain insight into how to do test-driven development and continuous

integration of your system. I found it amusing that the old faithful butler Hudson was

so quickly replaced with Jenkins. In any case, these are essential tools for managing

your project, along with tools like Checkstyle and FindBugs.

Studying this book will help you become a well-grounded Java developer. Not only

that, it will give you tips on how to stay well-grounded. Java is constantly changing. We’ll

see lambdas and modularization in the next version. New languages are being designed;

the concurrency constructs are being updated. Many of the things that you know are

true now might not be true in the future. The lesson is, don’t ever stop learning!

The other day I drove past the petrol station where Ben wanted to buy his beer.

Like so many companies in depressed Greece, it had closed. I never did find out if

they sold beer.

. H

EINZ

ABUTZ

AVA

PECIALISTS

’ N

EWSLETTER

剩余495页未读，继续阅读

amkkkk

粉丝: 0
资源: 7

精通Java 7与多语言编程核心技术

Java - The Well-Grounded Java Developer

The Well-Grounded Rubyist(2nd) mobi

The Well-Grounded Java Developer epub

well-grounded-rubyist-book-notes:我在Jupyter Lab（Ruby内核2.7.0）中实现的“ The Well-Grounded Rubyist”（Black＆Leo）的工作笔记。

the-well-grounded-rubyist:通过完善的Rubyist书来存储代码的存储库

The Well-Grounded Rubyist, 2nd Edition

The Well-Grounded Rubyist, 2nd Edition(2014)

well-grounded-rubyist:备注片段

The Well Grounded Java Developer

Well Grounded Java Developer

最新资源