class Day implements Comparable {

    @Override
    public boolean equals(Object dayObject)
    {
        if (dayObject == null || dayObject.getClass() != this.getClass()){
            return false;
        }

        Day day = (Day) dayObject;
        return this.dayStr.equals(day.dayStr);
    }

    public  Day(String dayStr);
    public  Day(String dayStr, List<Integer> hours);

}