learning scala pattern matching 03

Posted 2022-04-01 lianghong881018

 code: 

package com.aura.scala.day01

object patternMatching03 
  //当不同类型对象需要调用不同方法时，仅匹配类型的模式非常有用。
  def goIDLE(device : Device) =  device match 
    case p: Phone => p.screenOff
    case c:Computer => c.screenSaverOn
  

abstract class Device

case class Phone(model:String) extends  Device
  def screenOff = "Turning screen off"