public static Number minus(Character left,Number right){
  return NumberNumberMinus.minus(Integer.valueOf(left),right);
}

public static Number minus ( Character left , Number right ) { return NumberNumberMinus . minus ( Integer . valueOf ( left ) , right ) ; }
subtract a number from a character . the ordinal value of the character is used in the subtraction ( the ordinal value is the unicode value which for simple character sets is the ascii value ) .
