eferred expressions.  The <a href="../../javax/el/LambdaExpression.html" title="class in javax.el"><code>LambdaExpression</code></a>
encapsulates such a construct.  A <code>LambdaExpression</code> can be
invoked by supplying the actual parameters at evaluation.  It plays
an important role in the support for collections operators.</p>

<h3><a name="EvaluationListener">Evaluation Listeners</a></h3>
<p>By registering <a href="../../javax/el/EvaluationListener.html" title="class in javax.el"><code>EvaluationLis