Module java.base

Package java.util.regex

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

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

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

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

Related Documentation

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

Since:
1.4
  • Related Packages
    Package
    Description
    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
    An engine that performs match operations on acharacter sequence by interpreting aPattern.
    The result of a match operation.
    A compiled representation of a regular expression.
    Unchecked exception thrown to indicate a syntax error in a regular-expression pattern.