public class AtomicBoolean
extends java.lang.Object
implements java.io.Serializable
boolean
value that may be updated atomically. See the
edu.emory.mathcs.backport.java.util.concurrent.atomic
package specification for
description of the properties of atomic variables. An
AtomicBoolean
is used in applications such as atomically
updated flags, and cannot be used as a replacement for a
Boolean
.Constructor and Description |
---|
AtomicBoolean()
Creates a new
AtomicBoolean with initial value false . |
AtomicBoolean(boolean initialValue)
Creates a new
AtomicBoolean with the given initial value. |
Modifier and Type | Method and Description |
---|---|
boolean |
compareAndSet(boolean expect,
boolean update)
Atomically sets the value to the given updated value
if the current value
== the expected value. |
boolean |
get()
Returns the current value.
|
boolean |
getAndSet(boolean newValue)
Atomically sets to the given value and returns the previous value.
|
void |
lazySet(boolean newValue)
Eventually sets to the given value.
|
void |
set(boolean newValue)
Unconditionally sets to the given value.
|
java.lang.String |
toString()
Returns the String representation of the current value.
|
boolean |
weakCompareAndSet(boolean expect,
boolean update)
Atomically sets the value to the given updated value
if the current value
== the expected value. |
public AtomicBoolean(boolean initialValue)
AtomicBoolean
with the given initial value.initialValue
- the initial valuepublic AtomicBoolean()
AtomicBoolean
with initial value false
.public final boolean get()
public final boolean compareAndSet(boolean expect, boolean update)
==
the expected value.expect
- the expected valueupdate
- the new valuepublic boolean weakCompareAndSet(boolean expect, boolean update)
==
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 valuepublic final void set(boolean newValue)
newValue
- the new valuepublic final void lazySet(boolean newValue)
newValue
- the new valuepublic final boolean getAndSet(boolean newValue)
newValue
- the new valuepublic java.lang.String toString()
toString
in class java.lang.Object