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Message:

Weakrefs

Posted by Thomas on December 07, 2001 at 9:25 AM

You don't actually force gc when invoking System.gc() you merely advise the RunTime to run the gc.

Please also note that the WeakReference is not only nullyfied when running on low memory, but also if the object is left with only that (weak) reference as a holder for a long time.

> > Correct me if I am wrong, but won't the WeakReferenced
> > objects be reclaimed by GC only if it is running low
> > on memory and do not have any other strong references?.
> > You might want to start your command line program with

> > java -Xmx1M <- restrict your VM to 1 MB memory.

> No.
> You can force GC by invoking the static method gc() on the
> System object. eg:
>
> System.gc();
>
> This makes it easy to test wrefs.