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The _private lock object_ idiom can be used to prevent this vulnerability. The idiom consists of a {{private}} object declared as an instance field. The {{private}} object must be explicitly used for locking purposes in {{synchronized}} blocks, within the class's methods. This intrinsic lock is associated with the instance of the internal private object and is not with the class itself. Consequently, there is no lock contention between this class's methods and methods of a hostile class. \[[Bloch 01|AA. Java References#Bloch 01]\] |
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