Meal

/**
 * Tracks the number of calories a person consumes in a given meal.
 * Has helper method to get the day's total.
 */
public class Meal {
    public enum Type {
        BREAKFAST,
        LUNCH,
        DINER,
    }

    public Type type;
    double caloriesConsumed;

    public Meal(Type type, double caloriesConsumed) {
        this.type = type;
        this.caloriesConsumed = caloriesConsumed;
    }

    //Gets calories burned
    public double getCaloriesConsumed() {
        return caloriesConsumed;
    }

    //Sets calories burned
    public void setCaloriesConsumed(double caloriesConsumed) {
        this.caloriesConsumed = caloriesConsumed;
    }

    //Get type
    public Type getType() {
        return type;
    }

    //Set type
    public void setType(Type type) {
        this.type = type;
    }

    public boolean equals(Meal meal) {
        return meal.getType() == meal.getType() && meal.getCaloriesConsumed() == getCaloriesConsumed();
    }

    public static void check(Meal... meals) throws Exception {
        /**
         * Tries to find any duplicate meals within the given list.
         * The assumption is that a day can only contain one of each type of meal.
         */
        ArrayList<Type> types = new ArrayList<Type>();
        for (int i = 0; i < meals.length; i++) {
            if (types.contains(meals[i].type))
            {
                throw new Exception();
            }
            else
            {
                types.add(meals[i].type);
            }
        }
    }

    public static double getTodaysCalories(Meal... meals) throws Exception
    {
        check(meals);

        double total = 0;
        for (Meal meal : meals) {
            total += meal.caloriesConsumed; //Add calories to total
        }
        return total;
    }

    public static void main(String[] args) {
        Meal breakfast = new Meal(Type.BREAKFAST, 500.7);
        Meal lunch = new Meal(Type.LUNCH, 378.9);
        Meal dinner = new Meal(Type.DINER, 620.1);

        try {
            double caloriesConsumed = Meal.getTodaysCalories(breakfast, lunch, dinner);
            System.out.println("Today's Total Calories is " + caloriesConsumed);
        } catch (Exception e) {
            System.out.println("Unable to calculate today's calories");
        }
    }
}