17 lines
438 B
Java
17 lines
438 B
Java
Determining When an Object Is No Longer Used
|
|
|
|
// 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) {
|
|
}
|