Java 枚举怎么使用？

• 运行环境：

　　JDK8 + IntelliJ IDEA 2018.3 

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• 源码

　　　Demo类：

 

package com.ChenJiangT.demo2;

import java.util.Arrays;
import java.util.Scanner;

public class Demo2 {
    public static void main(String[] args) {
        System.out.println(Arrays.toString(Season.values()));
        Season[] sea=Season.values();

        for (Season a:sea) {
            System.out.println(a);
            System.out.println(a.name());
            System.out.println(a.ordinal());
        }
        Scanner sc=new Scanner(System.in);
        System.out.println("请输入您想要的季节（1--SPRING,2---SUMMER,3--AUTUMN,4--WINTER）");
        String s=sc.next();
        Season season = Season.valueOf(s);
        fun(season);

    }
    public static void fun(Season season){
        switch (season){
            case SUMMER:
                System.out.println("夏天来了");
                break;
            case AUTUMN:
                System.out.println("秋天来了");
                break;
            case WINTER:
                System.out.println("冬天来了");
                break;
            default:
                System.out.println("您的输入有误!");
        }
    }
}

Season 类：

package com.ChenJiangT.demo2;

public enum Season {
    SPRING,//春
    SUMMER,//夏
    AUTUMN,//秋
    WINTER;//冬
}

• 效果图：