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CSE143

Miniquiz #05  July 16, 2003

The method below takes a total and a count (as strings) and returns the average.  A number of errors are possible when the method runs.  Modify the method so that in case of any error at all, including a violated precondition, an IllegalArgumentException is thrown.  The method should not throw any other exceptions or indicate errors in any other way.

Note 1: java.lang.IllegalArgumentException is unchecked.

Note 2: valueOf throws a NumberFormatException if the string it is given is not a valid number.

public static double average(String total, String count) {

            Double totD = Double.valueOf(total);

            double tot = totD.doubleValue();

             Integer numD = Integer.valueOf(count);

            int num = numD.intValue();

            return tot/num;