🚀 go-pugleaf

Yes and no. A reference to Child1 object will lock NeverRelease object 
in memory, but I found few times that [at least some] Borland compilers 
pass null, if the parent object is not used, so there is no real 
difference, if JBuilder compiler is used. Please never define exceptions 
(and any Serializable classes) this way, the extra reference will force 
too many objects to be serialized.

- Alexey.

Vander wrote:
> I'm not quite sure about what kind of references to an object determine 
> its "alive" quality and its readiness for garbage collection. For the 
> moment I understand that *any* living reference, including non-explict 
> of member classes, keep the object alive.
> 
> Would you agree that the follwoing class "NeverRelease" entails 
> instances which will never get prone to garbage collection?
> 
> class NeverRelease
> {
>    Child1    child;
> 
>    public NeverRelease ()
>    {
>       child = new Child1();
>    }
> 
>    private class Child1
>    {
>    }
> }
> 
> While would you also agree that instances of the following class 
> "AlwaysRelease" always become garbage because the member class is static 
> and hence does not take reference to the enclosing class?
> 
> class AlwaysRelease
> {
>    Child2    child;
> 
>    public AlwaysRelease ()
>    {
>       child = new Child2();
>    }
> 
>    private static class Child2
>    {
>    }
> }

-- 
Alexey N. Solofnenko
home: http://trelony.cjb.net/

Ok. So let me refine the example as follows. Would you agree objects of 
NeverRelease will be locked in memory?

class NeverRelease
{
    String    habitat;
    Child1    child;

    public NeverRelease ( String street )
    {
       habitat = street;
       child = new Child1();
    }

    private class Child1
    {
       System.out.println( "Hello, I live in " + habitat );
    }
}

Sorry, that was rubbish. Here is the correct code version:

class NeverRelease
{
    String    habitat;
    Child1    child;

    public NeverRelease ( String street )
    {
       habitat = street;
       child = new Child1();
    }

    private class Child1
    {
       Child1 ()
       {
          System.out.println( "Hello, I live in " + habitat );
       }
    }
}