being signed, by looking for a signature in the META-INF
 directory with our alias/sigfile.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/tools/ant/taskdefs/SignJar.html#isUpToDate(java.io.File, java.io.File)">isUpToDate</a></strong>(java.io.File&nbsp;jarFile,
          java.io.File&nbsp;signedjarFile)</code>
<div class="block">Compare a jar file with its corresponding signed jar.</div>
</