Java 7精华教程：快速掌握Java 7新特性100+全面实例

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"Java 7 New Features Cookbook" 是一本深入浅出的指南，专为想要掌握Java 7最新特性的读者精心编撰。这本书由Richard M. Reese和Jennifer L. Reese共同撰写，旨在帮助读者快速理解和掌握Java 7中引入的众多令人兴奋的新功能。作为一本超过100个全面的配方集合，它不仅提供了详尽的技术讲解，还包含了实际操作示例和实战应用，让读者能够在实践中学习和应用这些新特性。 Java 7，也称为Java SE 7，是Java语言的一个重要里程碑，引入了一系列旨在提升性能、简化开发和增强可维护性的重要更新。这些新特性涵盖了多个领域，包括但不限于： 1. Lambda表达式：Lambda语法的引入使得函数式编程更加方便，允许在方法调用时传递简洁的代码块，提高了代码的简洁性和可读性。 2. Stream API：Java 7引入了Stream API，它提供了一种处理集合数据的强大工具，通过一系列链式操作，可以高效地进行数据处理和过滤，减少了传统迭代的复杂性。 3. 多方法接口（Default Methods）：允许接口包含默认实现，这样实现接口的类不再需要为每个方法提供自己的实现，提高了接口的灵活性。 4. 日期/时间API的改进：引入了`java.time`包，提供了更强大、一致和易于使用的日期和时间处理工具，取代了旧的`java.util.Date`和`java.util.Calendar`类。 5. 提高性能的优化：Java 7对垃圾回收机制进行了改进，提升了应用程序的内存管理效率，并且引入了`nio.2`包，支持更大的缓冲区和更高效的I/O操作。 6. 并发库增强：`Fork/Join Framework` 和 `Parallel Streams` 的引入，使得并行计算变得更简单，有助于利用多核处理器的性能。 7. JShell：一个交互式命令行环境，可以帮助开发者即时测试和调试代码，提高了开发效率。 8. 安全和性能增强：包括`nio.2`、`Nashorn JavaScript引擎`以及对HTTPS的改进等，提升了整体的安全性和系统性能。阅读本书，读者不仅可以学习到这些新特性的使用方法，还能了解到如何将它们融入到日常的项目开发中，从而提升代码质量，优化系统性能。然而，值得注意的是，尽管本书力求准确，但作者和出版社不承担因本书信息导致的任何直接或间接损失的责任，所有版权内容需经事先许可方可复制。 "Java 7 New Features Cookbook"是一本极具实用价值的参考书籍，适合Java开发者、技术爱好者以及希望提升自己技能的专业人士阅读和实践。

Preface

Who this book is for

This book is designed to bring those who are familiar with Java up-to-speed on the new

features found in Java 7.

Conventions

In this book, you will nd a number of styles of text that distinguish between different kinds

of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text are shown as follows: "We can include other contexts through the use of

the include directive."

A block of code is set as follows:

private void gameEngine(List<Entity> entities)

{

final Phaser phaser = new Phaser(1);

for (final Entity entity : entities)

{

final String member = entity.toString();

System.out.println(member + " joined the game");

phaser.register();

new Thread()

{

@Override

public void run()

{

System.out.println(member +

" waiting for the remaining

participants");

phaser.arriveAndAwaitAdvance(); // wait for

remaining entities

System.out.println(member + " starting run");

entity.run();

}

}.start();

}

phaser.arriveAndDeregister(); //Deregister and continue

System.out.println("Phaser continuing");

}

Preface

Reader feedback

Feedback from our readers is always welcome. Let us know what you think about this

book—what you liked or may have disliked. Reader feedback is important for us to develop

titles that you really get the most out of.

To send us general feedback, simply send an e-mail to feedback@packtpub.com, and

mention the book title through the subject of your message.

If there is a topic that you have expertise in and you are interested in either writing or

contributing to a book, see our author guide on www.packtpub.com/authors.

Customer support

Now that you are the proud owner of a Packt book, we have a number of things to help you

to get the most from your purchase.

Downloading the example code

You can download the example code les for all Packt books you have purchased from your

account at http://www.packtpub.com. If you purchased this book elsewhere, you can

visit http://www.packtpub.com/support and register to have the les e-mailed directly

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Errata

Although we have taken every care to ensure the accuracy of our content, mistakes do

happen. If you nd a mistake in one of our books—maybe a mistake in the text or the

code—we would be grateful if you would report this to us. By doing so, you can save other

readers from frustration and help us improve subsequent versions of this book. If you nd

any errata, please report them by visiting http://www.packtpub.com/support, selecting

your book, clicking on the errata submission form link, and entering the details of your

errata. Once your errata are veried, your submission will be accepted and the errata will be

uploaded to our website, or added to any list of existing errata, under the Errata section of

that title.

Piracy

Piracy of copyright material on the Internet is an ongoing problem across all media. At Packt,

we take the protection of our copyright and licenses very seriously. If you come across any

illegal copies of our works, in any form, on the Internet, please provide us with the location

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