JAVA 枚举类

Posted 2021-03-09 行尸走肉

摘抄在 b站尚硅谷JAVA教程

 

 

package com.LearnJava.enume;

enum Season{
    SPRING("春天","春暖花开"),
    SUMMER("夏天","夏日炎炎"),
    AUTUMO("秋天","秋高气爽"),
    WINTTER("冬天","白雪皑皑");

    private final String seasonName;
    private final String seasonDesc;


    Season(String seasonName, String seasonDesc) {
        this.seasonName = seasonName;
        this.seasonDesc = seasonDesc;
    }
}
public class TestEnume {
    public static void main(String[] args) {
        Season spring = Season.SPRING;

        System.out.println(spring);
        System.out.println(spring.getClass().getSuperclass());
    }
}
//SPRING
//class com.LearnJava.enume.Season

 

 常用方法:

 

 

 

 enum类实现接口,即可以对所有的枚举成员实现同样的虚方法,也可以针对特殊的枚举成员实现虚方法.

package com.LearnJava.enume;

interface Show{
    void show();
}

enum Season implements Show{
    SPRING("春天","春暖花开"){
        @Override
        public void show() {
            System.out.println("我是春天");
        }
    },
    SUMMER("夏天","夏日炎炎"),
    AUTUMO("秋天","秋高气爽"),
    WINTTER("冬天","白雪皑皑");

    private final String seasonName;
    private final String seasonDesc;


    Season(String seasonName, String seasonDesc) {
        this.seasonName = seasonName;
        this.seasonDesc = seasonDesc;
    }

    @Override
    public void show() {
        System.out.println("这是一个季节");
    }
}
public class TestEnume {
    public static void main(String[] args) {
        Season spring = Season.SPRING;
        spring.show();
        Season summer = Season.SUMMER;
        summer.show();
    }
}

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