A case proficient in enumeration classes

public class EumnTest {
    
    
    public static void main(String[] args) {
    
    
        //这是自定义模仿的枚举类
        System.out.println(Season.SPRING.getSeasonDesc()); //春暖花开
        System.out.println(Season.SPRING.getSeasonName()); //春天
        Season.SPRING.show(); //这是春天
        
        //=========================================================
        
        
        //这是枚举类特有的values方发，获取的是枚举类中全部枚举对象的名称集合；
        SeasonEumn[] values = SeasonEumn.values();
        for (SeasonEumn value : values) {
    
    
            //分别打印SPRING,SUMMER,AUTUM,WINTER，这些都是枚举对象的名
            System.out.println(value);
        }
        SeasonEumn spring = SeasonEumn.valueOf("SPRING");
        System.out.println(spring);
        SeasonEumn.AUTUM.toString();
        SeasonEumn.AUTUM.show();
    }
}

interface P {
    
    
    void show();
}
//自定义枚举类jdk5.0前枚举是要自定义使用的
class Season implements P{
    
    
    //1 枚举类的属性都用private final来修饰(在真正的枚举类中可以省略， 参考接口，
    //接口方法默认都是public abstract的，接口变量默认都是public static fianl)
    private final String seasonName;
    private final String seasonDesc ;
    //2 私有化类的构造器并给对象赋值
    private Season(String seasonName, String seasonDesc) {
    
    
        this.seasonName = seasonName;
        this.seasonDesc = seasonDesc;
    }
    //3 以public static final的形式提供当前枚举类的多个对象(真正的枚举类中可以省略，参考接口)
    public static final Season SPRING = new Season("春天","春暖花开"){
    
    
        @Override
        public void show() {
    
    
            System.out.println("这是春天");
        }
    };
    public static final Season SUMMER = new Season("夏天","骄阳似火"){
    
    
        @Override
        public void show() {
    
    
            System.out.println("这是夏天");
        }
    };
    public static final Season AUTUM = new Season("秋天","秋高气爽"){
    
    
        @Override
        public void show() {
    
    
            System.out.println("这是秋天");
        }
    };
    public static final Season WINTER = new Season("冬天","冰天雪地"){
    
    
        @Override
        public void show() {
    
    
            System.out.println("这是冬天");
        }
    };

    //4 提供一些获取枚举类属性的get方法及一些额外的方法
    public String getSeasonName() {
    
    
        return seasonName;
    }
    public String getSeasonDesc() {
    
    
        return seasonDesc;
    }

    @Override
    public String toString() {
    
    
        return "Season{" +
                "seasonName='" + seasonName + '\'' +
                ", seasonDesc='" + seasonDesc + '\'' +
                '}';
    }

    @Override
    public void show() {
    
    
        System.out.println("春夏秋冬通用");
    }
}

/*
经SeasonEumn.class.SuperClass测试，定义的枚举类均默认继承自java.lang.Eumn jdk5.0后推出
补充:Eumn类的toString是把对象名输出，我们可以选着重写，values方法是返回当前枚举类的对象数组
values方法，返回枚举类的对象数组，该方法方便遍历所有的枚举值;
valueOf(String str)：把一个字符串型的枚举对象(如果枚举类中没有相应对象与之匹配那么就报错)转化为相应的枚举类对象
 */

enum SeasonEumn implements P{
    
    
    //1 提供当前枚举类所需的枚举类，它们间用逗号隔开分号结尾;
    SPRING("春天","春暖花开"){
    
    
        @Override
        public void show() {
    
    
            System.out.println("Spring");
        }
    },
    SUMMER("夏天","骄阳似火"){
    
    
        @Override
        public void show() {
    
    
            System.out.println("Summer");
        }
    },
    AUTUM("秋天","秋高气爽"){
    
    
        @Override
        public void show() {
    
    
            System.out.println("AUTUM");
        }
    },
    WINTER("冬天","天寒地冻"){
    
    
        @Override
        public void show() {
    
    
            System.out.println("WINTER");
        }
    };
    //2 枚举类的属性都用private final来修饰(真正的枚举类中可以省略，参考接口)
    private final String seasonName;
    private final String seasonDesc ;
    //3 私有化类的构造器并给对象赋值
    private SeasonEumn(String seasonName, String seasonDesc) {
    
    
        this.seasonName = seasonName;
        this.seasonDesc = seasonDesc;
    }
    //4 提供一些获取枚举类属性的get方法及一些额外的方法
    public String getSeasonName() {
    
    
        return seasonName;
    }
    public String getSeasonDesc() {
    
    
        return seasonDesc;
    }

}