自定义枚举类及使用enum的枚举类

来源：互联网发布：java代码块执行顺序编辑：程序博客网时间：2024/05/17 03:33

自定义的枚举类，代码如下：

package com.atguigu.java1;public class TestSeason {    public static void main(String[] args) {        Season spring = Season.SPRING;        System.out.println(spring);        spring.show();        System.out.println(spring.getSeasonName());    }}//枚举类class Season{//1.提供类的属性，声明为private final     private final String seasonName;    private final String seasonDesc;//2.声明为final的属性，在构造器中初始化。    private Season(String seasonName,String seasonDesc){        this.seasonName = seasonName;        this.seasonDesc = seasonDesc;    }//3.通过公共的方法来调用属性    public String getSeasonName() {        return seasonName;    }    public String getSeasonDesc() {        return seasonDesc;    }//4.创建枚举类的对象:将类的对象声明public static final    public static final Season SPRING = new Season("spring", "春暖花开");    public static final Season SUMMER = new Season("summer", "夏日炎炎");    public static final Season AUTUMN = new Season("autumn", "秋高气爽");    public static final Season WINTER = new Season("winter", "白雪皑皑");@Override    public String toString() {        return "Season [seasonName=" + seasonName + ", seasonDesc="        + seasonDesc + "]";    }    public void show(){        System.out.println("这是一个季节");    }}

使用Enum的枚举类，代码如下：

package com.atguigu.java1;/* * 一、枚举类 * 1.如何自定义枚举类 * 2.如何使用enum关键字定义枚举类 *     >常用的方法:values() valueOf(String name) *     >如何让枚举类实现接口:可以让不同的枚举类的对象调用被重写的抽象方法，执行的效果不同。（相当于让每个对象重写抽象方法） */public class TestSeason1 {    public static void main(String[] args) {        Season1 spring = Season1.SPRING;        System.out.println(spring);        spring.show();        System.out.println(spring.getSeasonName());        System.out.println();        //1.values()        Season1[] seasons = Season1.values();        for(int i = 0;i < seasons.length;i++){            System.out.println(seasons[i]);        }        //2.valueOf(String name):要求传入的形参name是枚举类对象的名字。        //否则，报java.lang.IllegalArgumentException异常        String str = "WINTER";        Season1 sea = Season1.valueOf(str);        System.out.println(sea);        System.out.println();        Thread.State[] states = Thread.State.values();  //可自行查看Thread的源码；        for(int i = 0;i < states.length;i++){        System.out.println(states[i]);        }        sea.show();    }}interface Info{void show();}//枚举类enum Season1 implements Info{    SPRING("spring", "春暖花开"){        public void show(){        System.out.println("春天在哪里？");        }    },    SUMMER("summer", "夏日炎炎"){        public void show(){        System.out.println("生如夏花");        }    },    AUTUMN("autumn", "秋高气爽"){        public void show(){            System.out.println("秋天是用来分手的季节");        }    },    WINTER("winter", "白雪皑皑"){        public void show(){            System.out.println("冬天里的一把火");        }    };    private final String seasonName;    private final String seasonDesc;    private Season1(String seasonName,String seasonDesc){        this.seasonName = seasonName;        this.seasonDesc = seasonDesc;    }    public String getSeasonName() {        return seasonName;    }    public String getSeasonDesc() {        return seasonDesc;    }    //public void show(){        // System.out.println("这是一个季节");    //}}

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