Skip to Main Content
Regular Expression Pocket Reference, 2nd Edition
book

Regular Expression Pocket Reference, 2nd Edition

by Tony Stubblebine
July 2007
Intermediate to advanced content levelIntermediate to advanced
128 pages
2h 39m
English
O'Reilly Media, Inc.
Content preview from Regular Expression Pocket Reference, 2nd Edition

Supported Metacharacters

java.util.regex supports the metacharacters and metasequences listed in Table 11 through Table 15. For expanded definitions of each metacharacter, see "Regex Metacharacters, Modes, and Constructs.”

Table 1-11. Java character representations

Sequence

Meaning

\a

Alert (bell).

\b

Backspace, \x08, supported only in character class.

\e

Esc character, \x1B.

\n

Newline, \x0A.

\r

Carriage return, \x0D.

\f

Form feed, \x0C.

\t

Horizontal tab, \x09.

\0octal

Character specified by a one-, two-, or three-digit octal code.

\xhex

Character specified by a two-digit hexadecimal code.

\uhex

Unicode character specified by a four-digit hexadecimal code.

\cchar

Named control character.

Table 1-12. Java character classes and class-like constructs

Class

Meaning

[...]

A single character listed or contained in a listed range.

[^...]

A single character not liste and not contained within a listed range.

.

Any character, except a line terminator (unless DOTALL mode).

\w

Word character, [a-zA-Z0-9_].

\W

Nonword character, [^a-zA-Z0-9_].

\d

Digit, [0-9].

\D

Nondigit, [^0-9].

\s

Whitespace character, [ \t\n\f\r\x0B].

\S

Nonwhitespace character, [^ \t\n\f\r\x0B].

\p{prop}

Character contained by given POSIX character class, Unicode property, or Unicode block.

\P{prop}

Character not contained by given POSIX character class, Unicode property, or Unicode block.

Table 1-13. Java anchors and other zero-width tests

Sequence

Meaning

^

Start of string, or the point after any newline if in MULTILINE mode.

\A

Beginning of string, in any match mode.

$

End ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

PHP Advanced for the World Wide Web: Visual QuickPro Guide

PHP Advanced for the World Wide Web: Visual QuickPro Guide

Larry Ullman
PHP 5 Power Programming

PHP 5 Power Programming

Andi Gutmans, Stig Sæther Bakken, Derick Rethans

Publisher Resources

ISBN: 9780596514273Errata Page