枚举其他用法

package loaderman.demo

enum class EnumClass private constructor(val d:Int){
    A(1),B(2),C(3),D(4);

    override fun toString(): String{
        return d.toString()
    }

}

package loaderman

import loaderman.demo.EnumClass


fun main(arg: Array<String>) {

    val a = EnumClass.A
    println(a)
}

输出：1

package loaderman

import loaderman.demo.EnumClass


fun main(arg: Array<String>) {

    val a = EnumClass.A
    val name = EnumClass.A.name//枚举值名字
    val index = EnumClass.A.ordinal//枚举值名索引 0开始
    println(a)
    println(EnumClass.valueOf("A"))//通过valueOf方法传入枚举值名称获取枚举值对应的数值
    println(name)
    println(index)
}