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Package java.lang.ref

Provides reference-object classes, which support a limited degree of interaction with the garbage collector.

See: Description

Class Summary
Class Description
PhantomReference<T>

Phantom reference objects, which are enqueued after the collector determines that their referents may otherwise be reclaimed.

Reference<T>

Abstract base class for reference objects.

ReferenceQueue<T>

Reference queues, to which registered reference objects are appended by the garbage collector after the appropriate reachability changes are detected.

SoftReference<T>

Soft reference objects, which are cleared at the discretion of the garbage collector in response to memory demand.

WeakReference<T>

Weak reference objects, which do not prevent their referents from being made finalizable, finalized, and then reclaimed.

Package java.lang.ref Description

Provides reference-object classes, which support a limited degree of interaction with the garbage collector. A program may use a reference object to maintain a reference to some other object in such a way that the latter object may still be reclaimed by the collector. A program may also arrange to be notified some time after the collector has determined that the reachability of a given object has changed.

Since:
1.2

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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