Scala的包，继承复写之编程进阶（8）

本篇文章主要简介Scala的包，继承复写：

abstract class Person{ val counter : Int val counterArray = new Array[Int](counter) } class Sporter extends Person{ override val counter = 5 } class Programmer(val name : String,val salary:Double){ final override def equals(other: Any) = { val that = other.asInstanceOf[Programmer] if(that == null) false else name == that.name && salary == that.salary } final override def hashCode = name.hashCode() * 17 + salary.hashCode() * 9 } /*class Sporter extends { override val counter = 5 } with Person*/ object OverrideField extends App{ val s = new Sporter println(s.counterArray.length) }

输出结果为 0