java枚举类案例

一、基本枚举类
1、定义枚举类

package com.enumTest;

public enum WeekDay {
    Mon,Tus,WED,THU,FRI,SAT,SUN;
}

2、常用API

WeekDay x=WeekDay.Mon;
        System.out.println(x.compareTo(WeekDay.SUN));
        System.out.println(x.ordinal());
        System.out.println(x.name());
        System.out.println(x.equals(WeekDay.SUN));
        System.out.println(x.toString());
        WeekDay y=Enum.valueOf(WeekDay.class,"FRI");
        System.out.println(y);

二、枚举类放函数
1、枚举类定义

package com.enumTest;

public enum Season {
    SPRING,SUMMER,FALL,WINTER;
    public static String description(Season s){
        switch (s){
            case SPRING :
                return "天气潮湿";
            case SUMMER:
                return "天气炎热";
            case FALL:
                return "天气干燥";
            case WINTER:
                return "天气寒冷";
            default:
                return "";
        }
    }

}

2、主函数调用

        Season s=Season.SPRING;
        System.out.println(Season.description(s));