查看spring注解的源碼吧

//?課的狀態(tài)
public?enum?ClassType?{
????
????@ClassEnum(ZH_Message?=?"課已經(jīng)結(jié)束",EN_Message?=?"Class?was?end")
????CLASS_END,
????@ClassEnum(ZH_Message?=?"課已經(jīng)取消",EN_Message?=?"Class?was?cancal")
????CLASS_CANCAL,

}

@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public?@interface?ClassEnum?{
????String?EN_Message();
????String?ZH_Message();
}

java 的源代碼 中一時(shí)沒找到。但是枚舉注解非常有用。比如上面 的：中文，英文