private static Scanner ReadTheseNumbers;

public static void main (String[] args) throws Exception
{
        File file = new File( "ReadThis.txt");
        ReadTheseNumbers = new Scanner(file);

        List<Double> grades = new LinkedList<Double>();

        while (ReadTheseNumbers.hasNextInt()) {
            grades.add((double) ReadTheseNumbers.nextInt());
        }

        System.out.println("The average of the numbers in the file is: " + avg(grades));


    }

    public static double avg(List<Double> grades) {
        double sum = 0;
        for (Double i : grades) {
            sum += i;
        }
        return (sum / grades.size());
    }

     public static double median (List<Double> grades) {

            Arrays.sort(grades);
            if (grades.length % 2 == 0) {
                return (grades[grades.length/2]+grades[grades.length/2-1])/2.0;
            }
            else {
                return grades[grades.length/2];
            }

            System.out.println("The median is " + median (grades));

     }
        public static int  mode( grades[]) {
                int maxValue, maxCount;

                for (int i = 0; i < grades.length; ++i) {
                    int count = 0;
                    for (int j = 0; j < grades.length; ++j) {
                        if (grades[j] == grades[i]) ++count;
                    }
                    if (count > maxCount) {
                        maxCount = count;
                        maxValue = grades[i];
                    }
                }

                return maxValue;
            }
            System.out.println("The mode is " + mode(numbers));