| 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  | 
ReentrantLock
A reentrant mutual exclusion  
Lock with the same basic
 behavior and semantics as the implicit monitor lock accessed using
 synchronized methods and statements, but with extended
 capabilities. | 
static class  | 
ReentrantReadWriteLock.ReadLock
The lock returned by method  
ReentrantReadWriteLock.readLock(). | 
static class  | 
ReentrantReadWriteLock.WriteLock
The lock returned by method  
ReentrantReadWriteLock.writeLock(). | 
| Modifier and Type | Method and Description | 
|---|---|
Lock | 
StampedLock.asReadLock()
Returns a plain  
Lock view of this StampedLock in which
 the lock() method is mapped to StampedLock.readLock(),
 and similarly for other methods. | 
Lock | 
StampedLock.asWriteLock()
Returns a plain  
Lock view of this StampedLock in which
 the lock() method is mapped to StampedLock.writeLock(),
 and similarly for other methods. | 
Lock | 
ReadWriteLock.readLock()
Returns the lock used for reading. 
 | 
Lock | 
ReadWriteLock.writeLock()
Returns the lock used for writing. 
 | 
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