枚举入门

public class EnumDemo {public enum WeekDay {SUN, MON, TUE, WED, TRI, FRI, SAT;//相当对象}public static void main(String[] args){WeekDay weekDay = WeekDay.FRI;System.out.println(weekDay); //自动实现toString方法System.out.println(weekDay.name());//自己名字System.out.println(weekDay.ordinal());//排行System.out.println(weekDay.getClass());//自己类System.out.println(WeekDay.valueOf("SUN").toString());System.out.println(weekDay.values().length);//返回数组}}