public int difference(String s1,String s2) throws EncoderException {
  return SoundexUtils.difference(this,s1,s2);
}

public int difference ( String s1 , String s2 ) throws EncoderException { return SoundexUtils . difference ( this , s1 , s2 ) ; }
encodes the strings and returns the number of characters in the two encoded strings that are the same . this return value ranges from 0 through 4 : 0 indicates little or no similarity , and 4 indicates strong similarity or identical values .
