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<h4>isMatch</h4>
<pre>public&nbsp;int&nbsp;isMatch(char[]&nbsp;buffer,
          int&nbsp;pos)</pre>
<div class="block">Returns the number of matching characters, zero for no match.
 <p>
 This method is called to check for a match.
 The parameter <code>pos</code> represents the current position to be
 checked in the string <code>buffer</code> (a character array which must
 not be changed).
 The API guarantees that <code>pos