Package java.lang.ref
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
| Interface | Description |
|---|---|
| Cleaner.Cleanable |
|
| Class | Description |
|---|---|
| Cleaner |
|
| 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. |
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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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https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/ref/package-summary.html