How to get new variable value from inherited class?-CodePudding

open class Parent(){
  protected var z : Int? = null

  private fun getMyAge(){
    val x = 65
    val y = 10
    z = x % y 
  }
}

class Child:Parent(){
 ovveride fun getMyAge()
  println(z)  //here I get null
}

My question is: why I get null? Am I getting a variable from an inherited class incorrectly?

CodePudding user response：

It's because when you override the function, the super function is not called. If you want the function in parent class called, you must change your code to this:

open class Parent(){
  protected var z : Int? = null

  private fun getMyAge(){
    val x = 65
    val y = 10
    z = x % y 
  }
}

class Child:Parent(){
 ovveride fun getMyAge()
  super.getMyAge()
  println(z)
}