| Package | Description | 
|---|---|
| java.util.concurrent.locks | Interfaces and classes providing a framework for locking and waiting
 for conditions that is distinct from built-in synchronization and
 monitors. | 
| Modifier and Type | Method and Description | 
|---|---|
| Collection<Thread> | AbstractQueuedSynchronizer. getWaitingThreads(AbstractQueuedSynchronizer.ConditionObject condition)Returns a collection containing those threads that may be
 waiting on the given condition associated with this
 synchronizer. | 
| int | AbstractQueuedSynchronizer. getWaitQueueLength(AbstractQueuedSynchronizer.ConditionObject condition)Returns an estimate of the number of threads waiting on the
 given condition associated with this synchronizer. | 
| boolean | AbstractQueuedSynchronizer. hasWaiters(AbstractQueuedSynchronizer.ConditionObject condition)Queries whether any threads are waiting on the given condition
 associated with this synchronizer. | 
| boolean | AbstractQueuedSynchronizer. owns(AbstractQueuedSynchronizer.ConditionObject condition)Queries whether the given ConditionObject
 uses this synchronizer as its lock. | 
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