JAVA枚举类与注解

 建议使用enum方式来枚举：

public class SeasonTest {
    public static void main(String[] args) {
    Season Spring=Season.SPRING;
        System.out.println(Spring);
        System.out.println(Season.class.getSuperclass());
    }
}

enum Season{//多个对象用，隔开      结尾用；结束
    SPRING("春天", "春暖花开"),
    SUMMER("夏天", "夏日炎炎"),
    AUTUM("秋天", "秋高气爽"),
    WINTER("冬天", "冰天雪地");

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

    private final String seasonName;//季节名字
    private final String seasonDesc;//季节描述

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

    public String getSeasonDesc() {
        return seasonDesc;
    }

    public String getSeasonName() {
        return seasonName;
    }
}

Season values[]=Season.values();                          //用values方法得到枚举内容
for(int i=0;i< values.length;i++){
    System.out.println(values[i]);
}
System.out.println(Season.valueOf("SPRING"));             //用valuesof方法到枚举内容

 

 

元注解：

 

 通过反射获取注释信息

JAVA8中注解的新特性：