 <a href="zip.html">Zip</a> task for more details and examples.</p>
<p>If the manifest is omitted, a simple one will be supplied by Apache Ant.</p>

<p>The <code>update</code> parameter controls what happens if the JAR
file already exists. When set to <code>yes</code>, the JAR file is
updated with the files specified. When set to <code>no</code> (the
default) the JAR file is overwritten. An example use of this is
provided in the <a href="zip.html">Zip task documentation</a>.  Please
note that ZIP files stor