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java.util.concurrent.atomic
Class AtomicReference<V>
java.lang.Object
java.util.concurrent.atomic.AtomicReference<V>
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Type Parameters:
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V - The type of object referred to by this reference
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All Implemented Interfaces:
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Serializable
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public class AtomicReference<V>
- extends Object
- implements 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.
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Since:
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1.5
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See Also:
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Serialized Form
Constructor Summary
|
AtomicReference
()
Creates
Create
a new AtomicReference with null initial value. |
AtomicReference
(
V
Creates
Create
a new AtomicReference with the given initial value. |
Method Summary
|
boolean |
compareAndSet
(
V
expect,
V
Atomically
sets
set
the value to the given updated value if the current value
==
the expected value. |
V
|
get
()
Gets
Get
the current value. |
V
|
getAndSet
(
V
Atomically sets
Set
to the given value and
returns
return
the old value. |
void |
lazySet
set
(
V
Eventually sets
Set
to the given value. |
void
|
set
(
V
Sets to the given value.
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String
|
toString
()
Returns the String representation of the current value. |
boolean |
weakCompareAndSet
(
V
expect,
V
Atomically
sets
set
the value to the given updated value if the current value
==
the expected value. |
AtomicReference
public AtomicReference(V initialValue)
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Creates
Create
a new AtomicReference with the given initial value.
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Parameters:
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initialValue - the initial value
AtomicReference
public AtomicReference()
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Creates
Create
a new AtomicReference with null initial value.
get
public final V get()
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Gets
Get
the current value.
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Returns:
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the current value
set
public final void set(V newValue)
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Sets
Set
to the given value.
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-
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Parameters:
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newValue - the new value
lazySet
public final void lazySet ( V newValue)
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Eventually sets to the given value.
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Parameters:
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newValue - the new value
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Since:
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1.6
compareAndSet
public final boolean compareAndSet(V expect,
V update)
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Atomically
sets
set
the value to the given updated value if the current value
==
the expected value.
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-
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Parameters:
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expect - the expected value
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update - the new value
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Returns:
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true if successful. False return indicates that the actual value was not equal to the expected value.
weakCompareAndSet
public final boolean weakCompareAndSet(V expect,
V update)
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Atomically
sets
set
the value to the given updated value if the current value
==
the expected value. May fail spuriously.
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Parameters:
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expect - the expected value
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update - the new value
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Returns:
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true if successful.
getAndSet
public final V getAndSet(V newValue)
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Atomically sets
Set
to the given value and
returns
return
the old value.
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-
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Parameters:
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newValue - the new value
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Returns:
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the previous value
toString
public String toString()
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Returns the String representation of the current value.
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Overrides:
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toString
in class
Object
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Returns:
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the String representation of the current value.