# Uses of Package
java.lang.ref

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

- Classes in java.lang.ref used by java.lang.ref
  Class | Description
  --- | ---
  Cleaner | `Cleaner` manages a set of object references and corresponding cleaning actions.
  Cleaner.Cleanable | `Cleanable` represents an object and a cleaning action registered in a `Cleaner`.
  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.