scala 基礎九 scala 類的擴展和繼承extends override
阿新 • • 發佈:2017-07-03
rgs 繼承 res div cal def ack obj extends
1.scala 類的繼承
package smart.iot //父類 animal 有三個參數 class animal(var name:String,var age:Int,var eat:String) { } //子類 panda 繼承父類 animal class Panda( name:String, age:Int, eat:String,var blackeye:String) extends animal(name,age,eat) { } object load { def main(args: Array[String]): Unit = { var panda=new Panda("panpan",2,"竹子","2個黑眼圈"); println("panda "+"Name"+panda.name+"age:"+panda.age+"eat:"+panda.eat+"blackeye:"+panda.blackeye) } }
2.方法的重寫和參數的重寫 override
package smart.iot //父類 animal 有三個參數 class animal(var name:String,var age:Int,var eat:String) { val wing:String="啊啊啊"; def talk()=println("say english"); } //子類 panda 繼承父類 animal class Panda( name:String, age:Int, eat:String,var blackeye:String) extends animal(name,age,eat) { override val wing:String="熊貓大俠"; override def talk()=println("講中文"); } object load { def main(args: Array[String]): Unit = { var panda=new Panda("panpan",2,"竹子","2個黑眼圈"); println("panda "+"Name"+panda.name+"age:"+panda.age+"eat:"+panda.eat+"blackeye:"+panda.blackeye) println(panda.wing) panda.talk() } }
resout:
panda Namepanpanage:2eat:竹子blackeye:2個黑眼圈
熊貓大俠
講中文
scala 基礎九 scala 類的擴展和繼承extends override