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Class Summary | |
PhantomReference | A phantom reference is useful, to get notified, when an object got finalized. |
Reference | This is the base class of all references. |
ReferenceQueue | This is the queue, where references can enqueue themselve on. |
SoftReference | A soft reference will be cleared, if the object is only softly reachable and the garbage collection needs more memory. |
WeakReference | A weak reference will be cleared, if the object is only weakly reachable. |