">Constructs a new runtime exception with the specified cause and a  detail
 message of <code>(cause==null ? null : cause.toString())</code>  (which typically
 contains the class and detail message of  cause). This constructor is
 useful for runtime exceptions  that are little more than wrappers for
 other throwables.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>cause</code> - the cause (which is saved for later retrieval by the
 <code>Throwable.getCause()</code> method). (A <code>null</code> val