ava.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;getHeaderNames()</pre>
<div class="block">Gets the header names of this Part.

 <p>
 Some servlet containers do not allow servlets to access headers using this method, in which case this method returns
 <code>null</code>

 <p>
 Any changes to the returned <code>Collection</code> must not affect this <code>Part</code>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
