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| Preface |

## Conventions Used in This Book

Italic is used for:

- Pathnames, filenames, and program names.

- New terms where they are defined.

- Internet addresses, such as domain names and URLs.

Boldface is used for:

- Particular keys on a computer keyboard.

- Names of user interface buttons and menus.

`Constant Width` is used for:

- Anything that appears literally in a Java program, including keywords, data types, constants, method names, variables, class names, and interface names.

- Command lines and options that should be typed verbatim on the screen.

- All Java code listings.

- HTML documents, tags, and attributes.

- Method parameters, and general placeholders that indicate that an item is replaced by some actual value in your own program.

- Variable expressions in command-line options.

- Java class synopses in the quick-reference section. This very narrow font allows us to fit a lot of information on the page without a lot of distracting line breaks.

- Highlighting class, method, field, and constructor names in the quick-reference section, which makes it easier to scan the class synopses.

- Method parameter names and comments in the quick-reference section.

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