自定义枚举类示例

来自尚硅谷枚举类视频

/**
 * 枚举类：类的对象只有有限个、确定的。
 * 当需要一组常量时，强烈建议使用枚举类
 * 如果枚举类只有 一个对象时，则可以作为单例模式的实现方式。
 */
class Season {
    private final String seasonName;

    //构造器定义为私有，防止在此类外进行实例创建
    private Season(String seasonName) {
        this.seasonName = seasonName;
    }

    //定义确定个数的对象
    public static final Season SPRING = new Season("春季");
    public static final Season SUMMER = new Season("夏季");
    public static final Season AUTUMN = new Season("秋季");
    public static final Season WINTER = new Season("冬季");

    //    获取属性名
    public String getSeasonName() {
        return seasonName;
    }

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

public class EnumeDe001 {
    public static void main(String[] args) {
        System.out.println(Season.SPRING);
        String spring = Season.SPRING.getSeasonName();
        System.out.println(spring);

    }
}