Clients should
 consider priorities 0-4 as gradations of normal priority and priorities 5-9 as gradations of expedited priority.
 Priority is set to 4 by default.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>defaultPriority</code> - the message priority for this message producer; must be a value between 0 and 9</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../jakarta/jms/JMSException.html" title="class in jakarta.jms">JMSException</a></code> - if t