| PhantomReference<T> |
PhantomReference objects are used to detect referents which are no longer
visible and are eligible to have their storage reclaimed. |
| Reference<T> |
This class must be implemented by the vm vendor. |
| ReferenceQueue<T> |
The implementation of this class is provided. |
| SoftReference<T> |
SoftReference objects are used to detect referents which are no longer
visible and who's memory is to be reclaimed. |
| WeakReference<T> |
WeakReference objects are used to detect referents which are no longer
visible. |
