8.4.2 方法的重写

scala 明确规定，重写一个非抽象方法需要用override修饰符，明确需要调用超类的方法使用super关键字

package com.atguigu

object Student {
  def main(args: Array[String]): Unit = {
    val s = new Student
    s.say()
  }
}

class Student extends Person {
  def study(): Unit = {
    println(this.name + " good good study, day day up")
    super.say()
  }

  override def say(): Unit = {
    super.say()
    println("子类的say")
  }
}

class Person {
  var age = 10
  var name = "小明"

  def say(): Unit = {
    println("Person的say方法:" + this.age)
  }
}