黑马学习-------------------枚举

public class Test{public enum WeekDay{    SUN,MON,THE(2),WED,THU,FRI,SAT;        private WeekDay (){System.out.println("first");}        private WeekDay(int w){System.out.println("second");}    }public static void main(String[] args){          WeekDay week=WeekDay.SUN;          System.out.println(week);          System.out.println(week.ordinal());          System.out.println(week.name());          WeekDay  day=WeekDay.valueOf("FRI");          System.out.println(day.ordinal());          for (WeekDay  w:WeekDay.values()){System.out.println(w.name());System.out.println(w.ordinal());}}}