aders object. The order
 of header lines is preserved. <p>

 Note that the header lines are added into this InternetHeaders
 object, so any existing headers in this object will not be
 affected.  Headers are added to the end of the existing list
 of headers, in order.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>is</code> - RFC822 input stream</dd>
<dd><code>allowutf8</code> - if UTF-8 encoded headers are allowed</dd>
<dt>Throws:</dt>
<dd><code><a href="../MessagingException.html" title="class in