Question

I was reading the OCPJP (SCJP) book, when I came across this question in chapter 2.

class Uber{
 static int y= 2;
 Uber(int i){
    this();
    y = y*2;
 }

 Uber(){
    y++
 }

}

class Minor extends Uber{
 Minor(){
    super(y);
    y=y+3;
 }

 public static void main(String[] args){
    new Minor();
    System.out.println(y);
 }

}

The book says the answer should be 9, but I’m confused as to whether the compiler will recognize the y in super(y);. If it does how can that be?

Thanx in advance.

Answer 1

No, the code you’ve given won’t compile. It would compile if Minor extended Uber though – are you sure it doesn’t in the book?

(Even after getting it to compile, the code prints 7 for me, not 9. I can’t see how it would end up printing 9… it starts at 2, then is doubled to 4, then 3 is added to get 7…)