Uses of Class
Provides reference-object classes, which support a limited degree of interaction with the garbage collector.
Uses of Reference in java.lang.refModifier and TypeClassDescription
classPhantom reference objects, which are enqueued after the collector determines that their referents may otherwise be reclaimed.
classSoft reference objects, which are cleared at the discretion of the garbage collector in response to memory demand.
classWeak reference objects, which do not prevent their referents from being made finalizable, finalized, and then reclaimed.Modifier and TypeMethodDescriptionReferenceQueue.
poll()Polls this queue to see if a reference object is available.ReferenceQueue.
remove()Removes the next reference object in this queue, blocking until one becomes available.ReferenceQueue.
(long timeout)Removes the next reference object in this queue, blocking until either one becomes available or the given timeout period expires.