| 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 | Class and Description | 
|---|---|
| class  | AbstractQueuedLongSynchronizer.ConditionObjectCondition implementation for a  AbstractQueuedLongSynchronizerserving as the basis of aLockimplementation. | 
| class  | AbstractQueuedSynchronizer.ConditionObjectCondition implementation for a  AbstractQueuedSynchronizerserving as the basis of aLockimplementation. | 
| Modifier and Type | Method and Description | 
|---|---|
| Condition | ReentrantReadWriteLock.ReadLock. newCondition()Throws  UnsupportedOperationExceptionbecauseReadLocksdo not support conditions. | 
| Condition | ReentrantReadWriteLock.WriteLock. newCondition() | 
| Condition | Lock. newCondition()Returns a new  Conditioninstance that is bound to thisLockinstance. | 
| Condition | ReentrantLock. newCondition() | 
| Modifier and Type | Method and Description | 
|---|---|
| protected Collection<Thread> | ReentrantReadWriteLock. getWaitingThreads(Condition condition)Returns a collection containing those threads that may be
 waiting on the given condition associated with the write lock. | 
| protected Collection<Thread> | ReentrantLock. getWaitingThreads(Condition condition)Returns a collection containing those threads that may be
 waiting on the given condition associated with this lock. | 
| int | ReentrantReadWriteLock. getWaitQueueLength(Condition condition)Returns an estimate of the number of threads waiting on the
 given condition associated with the write lock. | 
| int | ReentrantLock. getWaitQueueLength(Condition condition)Returns an estimate of the number of threads waiting on the
 given condition associated with this lock. | 
| boolean | ReentrantReadWriteLock. hasWaiters(Condition condition)Queries whether any threads are waiting on the given condition
 associated with the write lock. | 
| boolean | ReentrantLock. hasWaiters(Condition condition)Queries whether any threads are waiting on the given condition
 associated with this lock. | 
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