Conventions Used in This Book

Several different styles of text in this book will help you understand different types of information. Some of the styles we've used are listed here:

Mission-critical information or tips we've found particularly valuable in development are included in a box such as this.

Tips, hints, tricks, and asides to the current discussion are offset and placed in italics like this.

As for styles in the text:

□ New terms and important words are highlighted when they're introduced.

□ Keyboard strokes appear like this: Ctrl+A.

□ Simple filenames, URLs, and code within the text look like so: persistence.properties.

□ Code is presented in two different ways:

In code examples, new and important code is highlighted with a gray background.

The gray highlighting is not used for code that's less important in the present context, or that has been shown before.

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