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Added in API level 1

Summary: Ctors | Methods | Inherited Methods | [Expand All]

AtomicBoolean

public class AtomicBoolean
extends Object implements Serializable

java.lang.Object
↳	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
`AtomicBoolean(boolean initialValue)` Creates a new `AtomicBoolean` with the given initial value.
`AtomicBoolean()` Creates a new `AtomicBoolean` with initial value `false`.

Public methods
`final boolean`	`compareAndSet(boolean expect, boolean update)` Atomically sets the value to the given updated value if the current value `==` the expected value.
`final boolean`	`get()` Returns the current value.
`final boolean`	`getAndSet(boolean newValue)` Atomically sets to the given value and returns the previous value.
`final void`	`lazySet(boolean newValue)` Eventually sets to the given value.
`final 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.

Inherited methods

From class


  
    java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Public constructors

AtomicBoolean

Added in API level 1

AtomicBoolean (boolean initialValue)

Creates a new AtomicBoolean with the given initial value.

Parameters
`initialValue`	`boolean`: the initial value

AtomicBoolean

Added in API level 1

AtomicBoolean ()

Creates a new AtomicBoolean with initial value false.

Public methods

compareAndSet

Added in API level 1

boolean compareAndSet (boolean expect, 
                boolean update)

Atomically sets the value to the given updated value if the current value == the expected value.

Parameters
`expect`	`boolean`: the expected value
`update`	`boolean`: the new value

Returns
`boolean`	`true` if successful. False return indicates that the actual value was not equal to the expected value.

get

Added in API level 1

boolean get ()

Returns the current value.

Returns
`boolean`	the current value

getAndSet

Added in API level 1

boolean getAndSet (boolean newValue)

Atomically sets to the given value and returns the previous value.

Parameters
`newValue`	`boolean`: the new value

Returns
`boolean`	the previous value

lazySet

Added in API level 9

void lazySet (boolean newValue)

Eventually sets to the given value.

Parameters
`newValue`	`boolean`: the new value

set

Added in API level 1

void set (boolean newValue)

Unconditionally sets to the given value.

Parameters
`newValue`	`boolean`: the new value

toString

Added in API level 1

String toString ()

Returns the String representation of the current value.

Returns
`String`	the String representation of the current value

weakCompareAndSet

Added in API level 1

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.

Parameters
`expect`	`boolean`: the expected value
`update`	`boolean`: the new value

Returns
`boolean`	`true` if successful