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Re: super

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Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> wrote:
> Joshua Cranmer <Pidgeot18@verizon.invalid> wrote:
>> On 9/18/2011 11:53 AM, giuseppe.on.usenet wrote:
>>> When I run dir2.Child, I get:
>>> var is 1
>>> which is what I was expecting.
>>> When I run dir2.GrandChild, I get:
>>> super.var is 2
>>> var is 2
>>> These last two variables have the same value, although I only modified
>>> gc.var in GrandChild.java. Why?
>> How many times did you declare a variable named `var'? By my count, you 
>> defined it once, so `var' and `super.var' both refer to the same 
>> variable `var', namely the one defined in Parent.
>
> I think the misunderstanding is far more basic.
>
> To giuseppe:
>
> In dir2.GrandChild's main, just remove the line, where you instantiate
> Child, and leave the rest exactly as is.  Recompile & run it.  You'll
> see that instantiating class Child (or not doing it) doesn't change
> anything. What does this tell you?

Alternatively, leave the line "Child c = new Child();" in, and rather
add another line "c.test()" to the end of GrandChild's main method.

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super "giuseppe.on.usenet" <giuseppe.on.usenet@gmail.com> - 2011-09-18 09:53 -0700
  Re: super Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-09-18 12:39 -0500
    Re: super Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-09-18 18:26 +0000
      Re: super Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-09-18 18:29 +0000
      Re: super "giuseppe.on.usenet" <giuseppe.on.usenet@gmail.com> - 2011-09-18 12:21 -0700
        Re: super Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-09-18 19:48 +0000
          Re: super Lew <lewbloch@gmail.com> - 2011-09-18 13:16 -0700

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