java.lang.ref

Interfaces

Cleanable

Cleanable represents an object and a cleaning action registered in a Cleaner.

Classes

Cleaner	Cleaner manages a set of object references and corresponding cleaning actions.
PhantomReference	Phantom reference objects, which are enqueued after the collector determines that their referents may otherwise be reclaimed.
Reference	Abstract base class for reference objects.
ReferenceQueue	Reference queues, to which registered reference objects are appended by the garbage collector after the appropriate reachability changes are detected.
SoftReference	Soft reference objects, which are cleared at the discretion of the garbage collector in response to memory demand.
WeakReference	Weak reference objects, which do not prevent their referents from being made finalizable, finalized, and then reclaimed.