Kotlin密封类

一、密封类非常简单

package net.println.kotlin.chapter4 import net.println.kotlin.chapter4.objects.Player import java.text.FieldPosition /** * @author:wangdong * @description:Sealed类的子类只能定义在它的类里面，或者与他在同一个文件里 */ /**定义一个播放的类*/ sealed class PlayerCmd{ //定义一个内部类,继承PlayerCmd //播放 class Play(val url: String,val position: Long = 0):PlayerCmd() //快进 class Seek(val position: Long): PlayerCmd() //暂停 class Pause: PlayerCmd() //继续 class Resume: PlayerCmd() //停止 class Stop: PlayerCmd() } /**枚举类*/ enum class PlayerState{ IDLE,PAUSE,PLAYING }

结束啦