Re: [xmlvm-users] Default values of member variables

[Panayotis K. <pan...@pa...>]

On 30 Οκτ 2009, at 8:35 μ.μ., Markus Heberling wrote:

> Hi,
>
> take this code convert it to objc and run it:
>
> public class Test{
>   Object thisIsNotInitialized;
>
>   void test(){
>        if(thisIsNotInitialized==null)
>            System.out.println("null");
>   }
>
>   public static void main(String[] args){
>       new Test().test();
>   }
> }
>
> I would expect to get "null" printed to the console. But that  
> doesn't happen. The generated if is something like thos:
>
> if (_op1.o != [NSNull null]) goto label0;
>
> So it checks for [NSNull null]. But _op1.o contains 0x0 and the  
> check is false. So I would guess that the initialization code of the  
> ObjC variables has to be changed so that they contain [NSNull null]  
> and not 0x0 by default.
>
> Hope you get what I mean.



If a selector returns nil, what is seen in Java?