CharacterIterator.setIndex
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 public abstract char setIndex( int position )
Parameters
-  position 
-  the position within the text.  Valid values range from
 getBeginIndex() to getEndIndex() - 1.  An IllegalArgumentException is thrown
 if an invalid value is supplied.
    
Returns
     the character at the specified position.
  Description
 Set the position to the specified position in the text and return that
 character.