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Classes for matching character sequences against patterns specified by regular
expressions.
An instance of the {@link 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 {@link java.util.regex.Matcher} class are used to match
character sequences against a given pattern. Input is provided to matchers via
the {@link 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
{@link java.lang.NullPointerException 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
@author Mike McCloskey
@author Mark Reinhold