8203;(<a href="ValidationEventHandler.html" title="interface in jakarta.xml.bind">ValidationEventHandler</a>&nbsp;handler)</code></th>
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<div class="block">Allow an application to register a <code>ValidationEventHandler</code>.</div>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setListener(jakarta.xml.bind.Unmarshaller.Listener)">setListener</a></span>&#8203;(<a href="U