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Uses of Class
java.lang.ref.Reference

• Packages that useReference 

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

• • Uses ofReference injava.lang.ref

    Subclasses ofReference injava.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 injava.lang.ref that returnReference 

    Modifier and Type	Method	Description
    Reference<? extendsT>	ReferenceQueue.poll()	Polls this queue to see if a reference object is available.
    Reference<? extendsT>	ReferenceQueue.remove()	Removes the next reference object in this queue, blocking until one becomes available.
    Reference<? extendsT>	ReferenceQueue.remove​(long timeout)	Removes the next reference object in this queue, blocking until either one becomes available or the given timeout period expires.