                                throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a>,
                                         <a href="../../../jakarta/servlet/ServletException.html" title="class in jakarta.servlet">ServletException</a></pre>
<div class="block">Creates an instance of <code>HttpUpgradeHandler</code> for a given class and uses it for the http protocol upgrade
 processing.</div>
<dl>
<dt><spa