这段代码感觉很清晰，可以理一下，看项目应该会看得更懂（？
package com.github.rd227.helloworldimport kotlin.properties.ReadWriteProperty
import kotlin.reflect.KPropertyopen class SmartDevice(val name: String, val category: String) {var deviceStatus = "online"protected setopen val deviceType = "unknown"open fun turnOn() {deviceStatus = "on"}open fun turnOff() {deviceStatus = "off"}
}class SmartTvDevice(deviceName: String, deviceCategory: String) :SmartDevice(name = deviceName, category = deviceCategory) {override val deviceType = "Smart TV"private var speakerVolume by RangeRegulator(initialValue = 2, minValue = 0, maxValue = 100)private var channelNumber by RangeRegulator(initialValue = 1, minValue = 0, maxValue = 200)fun increaseSpeakerVolume() {speakerVolume++println("Speaker volume increased to $speakerVolume.")}fun nextChannel() {channelNumber++println("Channel number increased to $channelNumber.")}override fun turnOn() {super.turnOn()println("$name is turned on. Speaker volume is set to $speakerVolume and channel number is " +"set to $channelNumber.")}override fun turnOff() {super.turnOff()println("$name turned off")}
}class SmartLightDevice(deviceName: String, deviceCategory: String) :SmartDevice(name = deviceName, category = deviceCategory) {override val deviceType = "Smart Light"private var brightnessLevel by RangeRegulator(initialValue = 0, minValue = 0, maxValue = 100)fun increaseBrightness() {brightnessLevel++println("Brightness increased to $brightnessLevel.")}override fun turnOn() {super.turnOn()brightnessLevel = 2println("$name turned on. The brightness level is $brightnessLevel.")}override fun turnOff() {super.turnOff()brightnessLevel = 0println("Smart Light turned off")}
}class SmartHome(val smartTvDevice: SmartTvDevice,val smartLightDevice: SmartLightDevice
) {var deviceTurnOnCount = 0private setfun turnOnTv() {deviceTurnOnCount++smartTvDevice.turnOn()}fun turnOffTv() {deviceTurnOnCount--smartTvDevice.turnOff()}fun increaseTvVolume() {smartTvDevice.increaseSpeakerVolume()}fun changeTvChannelToNext() {smartTvDevice.nextChannel()}fun turnOnLight() {deviceTurnOnCount++smartLightDevice.turnOn()}fun turnOffLight() {deviceTurnOnCount--smartLightDevice.turnOff()}fun increaseLightBrightness() {smartLightDevice.increaseBrightness()}fun turnOffAllDevices() {turnOffTv()turnOffLight()}
}class RangeRegulator(initialValue: Int,private val minValue: Int,private val maxValue: Int
) : ReadWriteProperty<Any?, Int> {var fieldData = initialValueoverride fun getValue(thisRef: Any?, property: KProperty<*>): Int {return fieldData// property 可以获取属性的元数据（名字、类型等）//这里没用到}
/*
*
*
* override fun setValue(thisRef: Any?, property: KProperty<*>, value: Int) {if (value in minValue..maxValue) {fieldData = value} else {// 用反射打印警告日志，包含属性名val className = thisRef?.javaClass?.simpleName ?: "Unknown"println("⚠️ [$className] 属性 '${property.name}' 赋值失败: $value 不在 [$minValue, $maxValue]")}//例如像这样反射访问，相当于把这个属性传进来，获取这个属性就是反射}
}
*
*
*/override fun setValue(thisRef: Any?, property: KProperty<*>, value: Int) {if (value in minValue..maxValue) {fieldData = value// property 可以获取属性的元数据（名字、类型等）}}
}fun main() {var smartDevice: SmartDevice = SmartTvDevice("Android TV", "Entertainment")smartDevice.turnOn()smartDevice = SmartLightDevice("Google Light", "Utility")smartDevice.turnOn()
}
1.反射
2.类的继承调用