Module java.base

Package java.util.regex

package java.util.regex

Classes for matching character sequences against patterns specified by regular expressions.

An instance of the Pattern class represents a regular expression that is specified in string form in a syntax similar to that used by Perl.

Instances of the Matcher class are used to match character sequences against a given pattern. Input is provided to matchers via the CharSequence interface in order to support matching against characters from a wide variety of input sources.

Unless otherwise noted, passing a null argument to a method in any class or interface in this package will cause a NullPointerException to be thrown.

Related Documentation

An excellent tutorial and overview of regular expressions is Mastering Regular Expressions, Jeffrey E. F. Friedl, O'Reilly and Associates, 1997.

Since:

1.4

Related Packages

Package	Description
java.util	Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.

Class	Description
Matcher	An engine that performs match operations on a character sequence by interpreting a Pattern.
MatchResult	The result of a match operation.
Pattern	A compiled representation of a regular expression.
PatternSyntaxException	Unchecked exception thrown to indicate a syntax error in a regular-expression pattern.