Scala路径依赖【内部类】

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  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()

  }
}

结果：