                <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;defaultUserName)</pre>
<div class="block">Call back to the application to get the needed user name and password.
 The application should put up a dialog something like:
 <pre>
 Connecting to &lt;protocol&gt; mail service on host &lt;addr&gt;, port &lt;port&gt;.
 &lt;prompt&gt;

 User Name: &lt;defaultUserName&gt;
 Password:
 </pre></div>
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<dt>