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

Instances of the java.util.regex.Matcher class are used to match character sequences against a given pattern. Input is provided to matchers via the java.lang.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.

Interfaces
MatchResult