Java的cnum类型

Java的cnum类型
所有的enum类型都是Enum的子类，也继承了相应方法

ordinal()返回枚举值所在的索引位置,从0开始

compareTo()比较两个枚举值的索引位置大小

toString()返回枚举值的字符串表示

valueOf()将字符串初始化为枚举对象

valucs()返回所有的枚举值

package org.example;public class DayTest {public static void main(String[] args){Day d1 = Day.MONDAY;Day d2 = Enum.valueOf(Day.class,"MONDAY");System.out.println(d1 == d2);Day d3= Enum.valueOf(Day.class,"TUESDAY");System.out.println(d1.compareTo(d3));for (Day item: Day.values()) {System.out.println(item.toString()+","+ item.ordinal());}}
}enum Day{MONDAY,TUESDAY,WEDNESDAY,THURSDAY,FRIDAY,SATURDAY,SUNDAY;
}