creating a new instance

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Tony Johansson - 24 May 2005 14:03 GMT

Hello!!

Here I create a new instance t of class Test and pass the referenc to method
goo.
When this method foo eventually finish will this instace t go out of scope
and be garbage collected.?
If not exactly what must occur so that the instance t be garbage collected.

void foo()
{
Test t = new Test;
goo(t);
}

//Tony

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Claus Petersen - 24 May 2005 14:14 GMT

> Hello!!
>
[quoted text clipped - 12 lines]
>
> //Tony

Short anwer: YES.......

But if you want to be sure, then set t = null; after the call to goo

Claus

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Casper B - 24 May 2005 15:40 GMT

> But if you want to be sure, then set t = null; after the call to goo

And (assuming everything is syncronous) if you REALLY want to be in
control, call the garbage collector explicitly:

System.gc();

/Casper

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Alex Molochnikov - 25 May 2005 16:53 GMT

> > But if you want to be sure, then set t = null; after the call to goo
>
[quoted text clipped - 4 lines]
>
> /Casper

... Except that the GC will never let you be in control. The call to
System.gc() is only a _suggestion_ to JVM to run the garbage collector. The
JVM may or may not do it on your request. Also, setting t to null is
superfluous. Once t goes out of scope in the given example, all references
to it are gone, and it becomes eligible for the collection - whether it was
nulled out or not.

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Raymond DeCampo - 24 May 2005 17:58 GMT

>>Hello!!
>>
[quoted text clipped - 18 lines]
>
> Claus

It depends also on what goo() does. If goo() stores a reference
somewhere t may not be eligible for GC.

Ray

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creating a new instance

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