Uses of Class java.lang.ref.Reference (Java SE 17 & JDK 17)
Description: use: module: java.base, package: java.lang.ref, class: Reference

# Uses of Class
java.lang.ref.Reference

Packages that use Reference
Package
Description
java.lang.ref
Provides reference-object classes, which support a limited degree of interaction with the garbage collector.

- ## Uses of Reference in java.lang.ref

  Subclasses of Reference in java.lang.ref
  Modifier and Type
  Class
  Description
  `class`
  `PhantomReference<T>`
  Phantom reference objects, which are enqueued after the collector determines that their referents may otherwise be reclaimed.
  `class`
  `SoftReference<T>`
  Soft reference objects, which are cleared at the discretion of the garbage collector in response to memory demand.
  `class`
  `WeakReference<T>`
  Weak reference objects, which do not prevent their referents from being made finalizable, finalized, and then reclaimed.
  Methods in java.lang.ref that return Reference
  Modifier and Type
  Method
  Description
  `Reference<? extends T>`
  ReferenceQueue.`poll()`
  Polls this queue to see if a reference object is available.
  `Reference<? extends T>`
  ReferenceQueue.`remove()`
  Removes the next reference object in this queue, blocking until one becomes available.
  `Reference<? extends T>`
  ReferenceQueue.`remove(long timeout)`
  Removes the next reference object in this queue, blocking until either one becomes available or the given timeout period expires.