 readExternal method must read the values in the same sequence
 and with the same types as were written by writeExternal.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>readExternal</code>&nbsp;in interface&nbsp;<code>java.io.Externalizable</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>in</code> - the ObjectInput object to read from</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.ClassNotFoundException</code> - If