om/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Sends a NOOP command to the FTP server.  This is useful for preventing
 server timeouts.
 <p></div>
<dl><dt><span class="strong">Returns:</span></dt><dd>True if successfully completed, false if not.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>org.apache.commons.net.ftp.FTPConnectionClosedException</code> - If the FTP server prematurely closes the conn