| 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. | 
| Constructor and Description | 
|---|
| ReadLock(ReentrantReadWriteLock lock)Constructor for use by subclasses | 
| WriteLock(ReentrantReadWriteLock lock)Constructor for use by subclasses | 
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