java.util.concurrent.atomic
Class AtomicBoolean
- Serializable
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
.
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.
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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.
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boolean | get() - Returns the current value.
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boolean | getAndSet(boolean newValue) - Atomically sets to the given value and returns the previous value.
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void | lazySet(boolean newValue) - Eventually sets to the given value.
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void | set(boolean newValue) - Unconditionally 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(boolean expect, boolean 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 |
AtomicBoolean
public AtomicBoolean()
Creates a new AtomicBoolean with initial value false.
AtomicBoolean
public AtomicBoolean(boolean initialValue)
Creates a new AtomicBoolean with the given initial value.
initialValue
- the initial value
compareAndSet
public final boolean compareAndSet(boolean expect,
boolean 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 boolean get()
Returns the current value.
getAndSet
public final boolean getAndSet(boolean newValue)
Atomically sets to the given value and returns the previous value.
lazySet
public final void lazySet(boolean newValue)
Eventually sets to the given value.
set
public final void set(boolean newValue)
Unconditionally 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 boolean weakCompareAndSet(boolean expect,
boolean 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