public final String nameOfDayInWeek(final int day) {
    return day == 0 ? "Monday" :
               day == 1 ? "Tuesday" :
               day == 2 ? "Wednesday" :
               day == 3 ? "Thursday" :
               day == 4 ? "Friday" :
               day == 5 ? "Saturday" :
               day == 6 ? "Sunday" :
               "Invalid position of day in week: " + day;
}