GradeCalc.java

import java.util.Scanner;

/****************************************
 * Amanuel Bogale
 * 9/28/16
 * GradeCalc
 * Inputs 4 grades and as a result
 *  finds the average of all grades
 ****************************************/

public class GradeCalc {

    static Scanner default_scan = new Scanner(System.in); // Scanner

    /*
     * Function to do all the
     * calculation and return
     * the average of all the
     * grades
     */
    private static double getGrades(double[] grades, int times) {
        /*
         * User Inputs For
         * Grades
         */
        int total = 0;
        for (int i = 0; i < times; i++) {
            System.out.println("Enter your #" + (i + 1) + " Grade");
            grades[i] = default_scan.nextDouble();
            total += grades[i];
        }

        /*
         * Return the average
         * of all the grades
         */
        return (total / times);
    }

    public static void main(String[] args) {
        String choice = new String("y"); // String object if user wants to continue

        while (choice.equals("y") || choice.equals("Y")) {

            START_CALC:
            /*
             * Ask User How Much Grades
             * To Count the average for
             */
                System.out.println("Number of Grades : ");
            final int NUM_GRADES = default_scan.nextInt();

            /*
             * Declare Array Where
             * Grades will be kept
             */
            double grades[] = new double[NUM_GRADES];

            /*
             * Print the average
             * of all the grades!
             */
            System.out.println("The Average Grade is = " + getGrades(grades, NUM_GRADES));

            /*
             * Ask User If he wants
             * To Continue
             */

            System.out.println("Want to enter another grade? (y/n)");
            choice = default_scan.next();
        }

        System.out.println("Thanks for using the grade average calculator!");
    }
}