java.lang.ref Class Hierarchy (Java Platform SE 8 )
Date: 2026-04-17

# Hierarchy For Package java.lang.ref

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - java.lang.ref.Reference<T>
    - java.lang.ref.PhantomReference<T>
    - java.lang.ref.SoftReference<T>
    - java.lang.ref.WeakReference<T>
  - java.lang.ref.ReferenceQueue<T>

Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2026, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.