lusterers/forOPTICSAndDBScan/Databases/Database.html" title="interface in weka.clusterers.forOPTICSAndDBScan.Databases">Database</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>size</dd></dl>
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<h4>keyIterator</h4>
<pre>public&nbsp;java.util.Iterator&nbsp;keyIterator()</pre>
<div class="block">Returns an iterator over all the keys</div>
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<dt><strong>Specified by:</strong></dt>
<dd><code><a h