java.util.concurrent.atomic.AtomicBoolean
A boolean value that may be updated atomically. See the
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.
Summary
Public Constructors
Public Methods
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait
Details
Public Constructors
public
AtomicBoolean(boolean initialValue)
Creates a new
AtomicBoolean with the given initial value.
Parameters
initialValue
| the initial value
|
public
AtomicBoolean()
Creates a new AtomicBoolean with initial value false.
Public Methods
public
final
boolean
compareAndSet(boolean expect, boolean update)
Atomically sets the value to the given update value if the
current value is equal to the expected value. Any given
invocation of this operation may fail (return
false) spuriously, but repeated invocation when
the current value holds the expected value and no other thread
is also attempting to set the value will eventually succeed.
Parameters
expect
| the expected value |
update
| the new value |
public
final
boolean
get()
Returns the current value.
public
final
boolean
getAndSet(boolean newValue)
Sets to the given value and returns the previous value.
public
final
void
set(boolean newValue)
Unconditionally sets to the given value.
public
String
toString()
Returns the String representation of the current value.
Returns
- the String representation of the current value.
public
boolean
weakCompareAndSet(boolean expect, boolean update)
Atomically set the value to the given updated value
if the current value
== the expected value.
May fail spuriously.
Parameters
expect
| the expected value |
update
| the new value |