/HashvalueAlgorithm.html" title="class in org.apache.tools.ant.types.selectors.modifiedselector">HashvalueAlgorithm</a></dd>
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<pre>public interface <span class="strong">Algorithm</span></pre>
<div class="block">The <i>Algorithm</i> defines how a value for a file is computed.
 It must be sure that multiple calls for the same file results in the
 same value.
 The implementing class should implement a useful toString() method.</div>
<dl><dt><span class="strong">Since:</span></dt>
  <dd>Ant 1.6</