java.lang.Enum

Java代码

Day day = Day.MONDAY;
//获取对象所代表的那个枚举类型的值
System.out.println(day.name()); //MONDAY

//当前枚举常量在所定义的枚举类型中所在的位置
System.out.println("ordinal: "+ day.ordinal()); 
//1
//比较是否类型与值都相同
System.out.println(day.equals("MONDAY")); 
//false

System.out.println("hashcode:"+ day.hashCode());

//比较同一个Enum中的数据的顺序。顺序比参数大则为正数，小为负数，相同为0.返回值就是位置相差的的个数
System.out.println("compareTo: "+ day.compareTo(Day.SATURDAY));//-5

//获得枚举对象的类
System.out.println(day.getDeclaringClass());