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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<meta name="author" value="Daniel Savarese">
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<title>Jakarta ORO - Demonstration Applet</title>
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<p><strong>About</strong></p>
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<li> <a href="./index.html">Overview</a>
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<li> <a href="http://jakarta.apache.org/site/binindex.cgi">Download</a>
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<li> <a href="./demo.html">Demonstration</a>
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<li> <a href="http://jakarta.apache.org/site/getinvolved.html">Get Involved</a>
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<p><strong>Documentation</strong></p>
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<li> <a href="./api/index.html">API</a>
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<p><strong>Related Projects</strong></p>
<ul>
<li> <a href="http://jakarta.apache.org/regexp/index.html">Regexp</a>
</li>
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<font color="#ffffff" face="arial,helvetica,sanserif">
<a name="Demonstration Applet"><strong>Demonstration Applet</strong></a>
</font>
</td></tr>
<tr><td>
<blockquote>
<p>
This demonstration requires the
<a href="http://java.sun.com/products/plugin/index.html">
Java Plugin</a>.
</p>
<center>
<object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" codebase="classes/" width="400" height="400">
<param name="code" value="examples/MatcherDemoApplet.class" />
<param name="codebase" value="classes/" />
<param name="type" value="application/x-java-applet;version=1.4" />
<param name="fontSize" value="14" />
<param name="background" value="d2b48c" />
<comment>
<embed type="application/x-java-applet;version=1.4" codebase="classes/" code="examples/MatcherDemoApplet.class" width="400" height="400" pluginspage="http://java.sun.com/products/plugin/1.3/plugin-install.html">
<param name="fontSize" value="14" />
<param name="background" value="d2b48c" />
</embed>
<noembed>
<hr />
If you can't see the demo applet, please try enabling
Java in your browser or downloading the
<a href="http://java.sun.com/products/plugin/index.html">
Java Plugin</a>.
<hr />
</noembed>
</comment>
</object>
</center>
<p>
Jakarta ORO's text processing classes support a wide range
of features which are not demonstrated in this applet.
Here we allow you to test for yourself the Perl5, AWK, and glob
regular expression support from the org.apache.oro.text.regex,
org.apache.oro.text.awk, and org.apache.oro.text packages.
The Perl5 syntax demonstrated is Perl 5.003 compatible as of
version 2.0.2. Remember, Perl5 compatibility means that
zero-width lookahead assertions, greed control, backreferences,
and other features are supported. This applet only demonstrates
the basic functionality of the packages. The split and substitute
methods of the Util class and other features are not demonstrated
here. To get a better idea of what else you can do with Jakarta
ORO, you should look through the <a href="api/index.html">API
documentation</a>.
</p>
</blockquote>
</p>
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<table border="0" cellspacing="0" cellpadding="2" width="100%">
<tr><td bgcolor="#525D76">
<font color="#ffffff" face="arial,helvetica,sanserif">
<a name="Instructions"><strong>Instructions</strong></a>
</font>
</td></tr>
<tr><td>
<blockquote>
<p>
Select a regular expression syntax in the topmost choice menu.
Type a regular expression in the first text field. Then in
the <b>Search Input</b> text area, enter text that you want to
search. Click the <b>Search</b> button to search the input text.
The results will appear in the <b>Search Results</b> text area.
The <b>Reset</b> button will clear the regular expression, input,
and result text.
</p>
<p>
There are two choice menus that affect the regular expression
search. The <b>contains()</b> item causes the
<code>contains()</code> method of the PatternMatcher interface to be
used to perform the search. This search is done in a while loop,
finding all pattern matches occuring within the input. The
<b>matches()</b> item causes the <code>matches()</code> method of
the PatternMatcher interface to be used to perform the search. The
<code>matches()</code> method only tests if all the input
<b>EXACTLY</b> matches the regular expression. It does not check
to see if there is a match somewhere inside the input. That is
what the <code>contains()</code> method is for. This is sometimes
a point of confusion for users who have tried other packages. In
Jakarta ORO, <code>matches()</code> is used to find exact matches,
and <code>contains</code> is used to find a match contained in the
input.
</p>
<p>
The <b>Case Sensitive</b> and <b>Case Insensitive</b> choice items
are self-explanatory. <b>Case Sensitive</b> causes the regular
expression to be compiled with case sensitivity enabled. <b>Case
Insensitive</b> causes the regular expression to treat upper and
lower case characters the same.
</p>
<p>
The <b>Search Results</b> text area will display all the matches
found in the input when the <b>contains()</b> choice item is
selected. It will also display what the parenthesized subgroups
of a regular expression matched. When the <b>matches()</b> choice
item is selected, only whether or not the input exactly matched
the pattern is indicated.
</p>
<p>
Please note that if you don't enter anything for a regular
expression, it will be compiled as an expression matching a
zero-length string (the null string), which will match before and
after every character in the input.
</p>
</blockquote>
</p>
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