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

 <p> 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.

 <p> 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. </p>

 <p> Unless otherwise noted, passing a <tt>null</tt> argument to a method
 in any class or interface in this package will cause a
 {@link java.lang.NullPointerException NullPointerException} to be thrown.

 <h2>Related Documentation</h2>

 <p> An excellent tutorial and overview of regular expressions is <a
 href="http://www.oreilly.com/catalog/regex/"><i>Mastering Regular
 Expressions</i>, Jeffrey E. F. Friedl, O'Reilly and Associates, 1997.</a> </p>

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 @since 1.4
 @author Mike McCloskey
 @author Mark Reinhold

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	Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved.
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	accompanied this code).

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	Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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	Classes for matching character sequences against patterns specified by regular
	expressions.

	<p> 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.

	<p> 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. </p>

	<p> Unless otherwise noted, passing a <tt>null</tt> argument to a method
	in any class or interface in this package will cause a
	{@link java.lang.NullPointerException NullPointerException} to be thrown.

	<h2>Related Documentation</h2>

	<p> An excellent tutorial and overview of regular expressions is <a
	href="http://www.oreilly.com/catalog/regex/"><i>Mastering Regular
	Expressions</i>, Jeffrey E. F. Friedl, O'Reilly and Associates, 1997.</a> </p>

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	For overviews, tutorials, examples, guides, and tool documentation, please see:
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	@since 1.4
	@author Mike McCloskey
	@author Mark Reinhold

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