interface InputDevice { //输入设备接口
fun input(event: Any) //输入的方法
}
interface USBInputDevice: InputDevice //user输入设备接口
interface BLEInputDevice: InputDevice //蓝牙输入设备接口
interface OpticalMouse //光电鼠标接口
abstract class USBMouse(val name: String): USBInputDevice, OpticalMouse { //usb鼠标
override fun input(event: Any) {
}
override fun toString(): String {
return name
}
}
class LogitechMouse : USBMouse("罗技鼠标") {
}
class Computer { //电脑类
fun addUSBInputDevice(inputDevice: USBInputDevice) { //插入usb输入设备
println("add usb input device: $inputDevice")
}
fun addBLEInputDevice(inputDevice: BLEInputDevice) { //插入蓝牙输入设备
println("add ble input device: $inputDevice")
}
fun addInputDevice(inputDevice: InputDevice) { //插入输入设备
when (inputDevice) {
is BLEInputDevice -> {
addBLEInputDevice(inputDevice)
}
is USBInputDevice -> {
addUSBInputDevice(inputDevice)
}
else -> {
throw IllegalArgumentException("输入设备类型不支持")
}
}
}
}
fun main(args: Array<String>) {
val computer = Computer() //新建电脑
val mouse = LogitechMouse() //新建罗技鼠标
computer.addInputDevice(mouse) //把鼠标添加到电脑上
}
运行结果
