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Java™ Platform Standard Ed. 6 |
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java.lang.Object java.util.concurrent.atomic.AtomicBoolean
public class 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
.
Constructor Summary | |
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AtomicBoolean()
Creates a new AtomicBoolean with initial value false . |
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AtomicBoolean(boolean initialValue)
Creates a new AtomicBoolean with the given initial value. |
Method Summary | |
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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. |
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. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public AtomicBoolean(boolean initialValue)
AtomicBoolean
with the given initial value.
initialValue
- the initial valuepublic AtomicBoolean()
AtomicBoolean
with initial value false
.
Method Detail |
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public final boolean get()
public final boolean compareAndSet(boolean expect, boolean update)
==
the expected value.
expect
- the expected valueupdate
- the new value
public 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 value
public 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 value
public String toString()
toString
in class Object
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Java™ Platform Standard Ed. 6 |
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Copyright 2006 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.