java.util.concurrent.atomic
Class AtomicReference<V>
- Serializable
An object reference that may be updated atomically. See the java.util.concurrent.atomic
package specification for description
of the properties of atomic variables.
AtomicReference() - Creates a new AtomicReference with null initial value.
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AtomicReference(V initialValue) - Creates a new AtomicReference with the given initial value.
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boolean | compareAndSet(V expect, V update) - Atomically sets the value to the given updated value
if the current value == the expected value.
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V | get() - Gets the current value.
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V | getAndSet(V newValue) - Atomically sets to the given value and returns the old value.
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void | lazySet(V newValue) - Eventually sets to the given value.
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void | set(V newValue) - Sets to the given value.
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String | toString() - Returns the String representation of the current value.
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boolean | weakCompareAndSet(V expect, V update) - Atomically sets the value to the given updated value
if the current value == the expected value.
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clone , equals , extends Object> getClass , finalize , hashCode , notify , notifyAll , toString , wait , wait , wait |
AtomicReference
public AtomicReference()
Creates a new AtomicReference with null initial value.
AtomicReference
public AtomicReference(V initialValue)
Creates a new AtomicReference with the given initial value.
initialValue
- the initial value
compareAndSet
public final boolean compareAndSet(V expect,
V update)
Atomically sets the value to the given updated value
if the current value == the expected value.
expect
- the expected valueupdate
- the new value
- true if successful. False return indicates that
the actual value was not equal to the expected value.
get
public final V get()
Gets the current value.
getAndSet
public final V getAndSet(V newValue)
Atomically sets to the given value and returns the old value.
lazySet
public final void lazySet(V newValue)
Eventually sets to the given value.
set
public final void set(V newValue)
Sets to the given value.
toString
public String toString()
Returns the String representation of the current value.
- toString in interface Object
- the String representation of the current value.
weakCompareAndSet
public final boolean weakCompareAndSet(V expect,
V update)
Atomically sets the value to the given updated value
if the current value == the expected value.
May fail spuriously and does not provide ordering guarantees,
so is only rarely an appropriate alternative to compareAndSet.
expect
- the expected valueupdate
- the new value