code><a href="PropertyNotWritableException.html" title="class in jakarta.el">PropertyNotWritableException</a></code> - if the bean cannot be modified or created.</dd>
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<h4>isReadOnly</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;isReadOnly&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface