va/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if <tt>urlPatterns</tt> is null or empty</dd>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</a></code> - if the ServletContext from which this ServletRegistration was obtained has
                                  already been initialized</dd>
</