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<h4>onDataAvailable</h4>
<pre class="methodSignature">void&nbsp;onDataAvailable()
              throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></pre>
<div class="block">When an instance of the <code>ReadListener</code> is registered with a <a href="ServletInputStream.html" title="class