Thanks for the response, Paul. Here's what I am up to. I can get an
object from the weak reference created from a strong reference. What
I want to do, and am not sure if I can (I am starting to think I
cannot), is to grab the object with the weak reference and make
changes which will happen also with the strong reference. So far, it
seems that when I have the object of a weak reference created form a
strong reference and change this object, it does not affect the object
of the strong reference.
E.g.
package com.crackwillow.deploy;
import java.lang.ref.WeakReference;
import java.lang.ref.Reference;
public class MyReference {
public static void main(String [] params) {
String string = new String("Aaaaaaaaaa");
WeakReference wr = new WeakReference(string);
wr = replace(wr);
System.out.println(string);
System.out.println(wr);
string = (String)((Reference)wr).get();
System.out.println(string);
}
public static WeakReference replace(WeakReference wr) {
return new WeakReference(((String)wr.get()).replaceAll("A","B"));
}
}
Apparently there is no connection between the objects referred to by
string and wr in the code shown above.
Is this clearer?
Jack
On Thu, 02 Dec 2004 02:03:39 -0500, Paul Speed <[EMAIL PROTECTED]> wrote:
> A WeakReference is just a way of holding a reference to an object that
> will not keep it from being garbage collected (a very useful thing).
> There are also ways that you can track when it has been garbage
> collected. Once it has been garbage collected, it's gone though. All
> you have is any data you originally associated with your WeakReference
> (by subclassing or some other method). You cannot access the referenced
> object anymore because it doesn't exist.
>
> While the object still exists (ie: is strongly referenced some where),
> you can still access it through the WeakReference. You just have to
> expect that at some point you may go to retrieve it from the
> WeakReference and get a null.
>
> Maybe it would help to know what you are trying to do with it. There
> are other Reference implementations that may be better suited.
>
> -Paul
>
> Dakota Jack wrote:
>
> > Working here on a "new" paradigm, sort of, I think.
> >
> > Apparently you can track what has happened to a strong reference with
> > a weak reference but you cannot manipulate the object referred to by
> > the strong reference by manipulating the weak reference. Is that
> > right? Seems odd to me.
> >
> > Jack
> >
> >
>
>
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"You can't wake a person who is pretending to be asleep."
~Native Proverb~
"Each man is good in His sight. It is not necessary for eagles to be crows."
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