Determining When an Object Is No Longer Used
A weak reference is used to determine when an object
is no longer being referenced.
// Create the weak reference.
ReferenceQueue rq = new ReferenceQueue();
WeakReference wr = new WeakReference(object, rq);
// Wait for all the references to the object.
try {
while (true) {
Reference r = rq.remove();
if (r == wr) {
// Object is no longer referenced.
}
}
} catch (InterruptedException e) {
}
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