In Java, when an target object A is only reached by weak reference B, A can be GC. what happen if the weak reference B is reached by a strong reference C at same time? For exmaple, C points to a class instance which contains a field of weak reference B which points to A. If C is live, and there is no other weak or strong reference to obj A, can A still be GC?
when strong reference directly access weak reference
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Yes, since there is one weak refence as a link it is considered weakly reachable. The Wikipedia entry on Weak reference says (in part)