大数据Spark “蘑菇云”行动前传第19课：Scala的包、继承覆写及Spark源码鉴赏
1 Spark源码中的包和继承的源代码鉴赏
2 Scala的包、继承编程操作实战
package com.dt.spark.scala.bascis
class Person {
val counter =3
val counterArray =new Array[Int](counter)
}
class Sporter extends Person {
override val counter =5
final override def equals(other:Any){
}
}
class Programmer(val name:String,val salary : Double){
final override def e
