Package java.lang.ref

Class Summary

PhantomReference<T> A phantom reference is useful, to get notified, when an object got finalized.

Reference<T> This is the base class of all references.

ReferenceQueue<T> This is the queue, where references can enqueue themselve on.

SoftReference<T> A soft reference will be cleared, if the object is only softly reachable and the garbage collection needs more memory.

WeakReference<T> A weak reference will be cleared, if the object is only weakly reachable.