ITY</code> and
 <code>Double.NEGATIVE_INFINITY</code> are among the values, the result is
 <code>NaN.</code></li>
 </ul></p>
 <p>
 <strong>Note that this implementation is not synchronized.</strong> If
 multiple threads access an instance of this class concurrently, and at least
 one of the threads invokes the <code>increment()</code> or
 <code>clear()</code> method, it must be synchronized externally.</p></div>
<dl><dt><span class="strong">Version:</span></dt>
  <dd>$Id: SumOfLogs.java 1416643 2012-12-03 1