package big.data.analyse.scala.path_dependence

 /**

   * 路径依赖

   * Created by zhen on 2018/12/24.

   */

 // 定义外部类，内部类

 class Outer(val width: Int, val height : Int){

   //private val width = 12

   //private val height = 6

   class Inner{

     private val space = width * height

     def show(): Unit ={

       println(" the space is equal : " + space)

     }

   }

 }

 object PathDependence {

   def main(args: Array[String]) {

     val outer = new Outer(6, 8)

     val inner = new outer.Inner

     inner.show()

     // 特定类型的内部类

     val inner_belong_outer : outer.Inner = new outer.Inner

     inner_belong_outer.show()

     val another_other = new Outer(3, 4)

     //val another_inner : outer.Inner = new another_other.Inner // Inner doesn't conform

     val use_inner : Outer#Inner = new another_other.Inner // # 表示Inner是Outer的内部类

     use_inner.show()

   }

 }