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AtomicIntegerArray

public class AtomicIntegerArray
extends Object implements Serializable

java.lang.Object
↳	java.util.concurrent.atomic.AtomicIntegerArray

An int array in which elements may be updated atomically. See the java.util.concurrent.atomic package specification for description of the properties of atomic variables.

Summary

Public constructors
`AtomicIntegerArray(int length)` Creates a new AtomicIntegerArray of the given length, with all elements initially zero.
`AtomicIntegerArray(int[] array)` Creates a new AtomicIntegerArray with the same length as, and all elements copied from, the given array.

Public methods
`final int`	`accumulateAndGet(int i, int x, IntBinaryOperator accumulatorFunction)` Atomically updates the element at index `i` with the results of applying the given function to the current and given values, returning the updated value.
`final int`	`addAndGet(int i, int delta)` Atomically adds the given value to the element at index `i`.
`final boolean`	`compareAndSet(int i, int expect, int update)` Atomically sets the element at position `i` to the given updated value if the current value `==` the expected value.
`final int`	`decrementAndGet(int i)` Atomically decrements by one the element at index `i`.
`final int`	`get(int i)` Gets the current value at position `i`.
`final int`	`getAndAccumulate(int i, int x, IntBinaryOperator accumulatorFunction)` Atomically updates the element at index `i` with the results of applying the given function to the current and given values, returning the previous value.
`final int`	`getAndAdd(int i, int delta)` Atomically adds the given value to the element at index `i`.
`final int`	`getAndDecrement(int i)` Atomically decrements by one the element at index `i`.
`final int`	`getAndIncrement(int i)` Atomically increments by one the element at index `i`.
`final int`	`getAndSet(int i, int newValue)` Atomically sets the element at position `i` to the given value and returns the old value.
`final int`	`getAndUpdate(int i, IntUnaryOperator updateFunction)` Atomically updates the element at index `i` with the results of applying the given function, returning the previous value.
`final int`	`incrementAndGet(int i)` Atomically increments by one the element at index `i`.
`final void`	`lazySet(int i, int newValue)` Eventually sets the element at position `i` to the given value.
`final int`	`length()` Returns the length of the array.
`final void`	`set(int i, int newValue)` Sets the element at position `i` to the given value.
`String`	`toString()` Returns the String representation of the current values of array.
`final int`	`updateAndGet(int i, IntUnaryOperator updateFunction)` Atomically updates the element at index `i` with the results of applying the given function, returning the updated value.
`final boolean`	`weakCompareAndSet(int i, int expect, int update)` Atomically sets the element at position `i` 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 timeout, 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 timeout)` 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

AtomicIntegerArray

public AtomicIntegerArray (int length)

Creates a new AtomicIntegerArray of the given length, with all elements initially zero.

Parameters
`length`	`int`: the length of the array

AtomicIntegerArray

public AtomicIntegerArray (int[] array)

Creates a new AtomicIntegerArray with the same length as, and all elements copied from, the given array.

Parameters
`array`	`int`: the array to copy elements from

Throws
`NullPointerException`	if array is null

Public methods

accumulateAndGet

public final int accumulateAndGet (int i, 
                int x, 
                IntBinaryOperator accumulatorFunction)

Atomically updates the element at index i with the results of applying the given function to the current and given values, returning the updated value. The function should be side-effect-free, since it may be re-applied when attempted updates fail due to contention among threads. The function is applied with the current value at index i as its first argument, and the given update as the second argument.

Parameters
`i`	`int`: the index
`x`	`int`: the update value
`accumulatorFunction`	`IntBinaryOperator`: a side-effect-free function of two arguments

Returns
`int`	the updated value

addAndGet

public final int addAndGet (int i, 
                int delta)

Atomically adds the given value to the element at index i.

Parameters
`i`	`int`: the index
`delta`	`int`: the value to add

Returns
`int`	the updated value

compareAndSet

public final boolean compareAndSet (int i, 
                int expect, 
                int update)

Atomically sets the element at position i to the given updated value if the current value == the expected value.

Parameters
`i`	`int`: the index
`expect`	`int`: the expected value
`update`	`int`: the new value

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

decrementAndGet

public final int decrementAndGet (int i)

Atomically decrements by one the element at index i.

Parameters
`i`	`int`: the index

Returns
`int`	the updated value

get

public final int get (int i)

Gets the current value at position i.

Parameters
`i`	`int`: the index

Returns
`int`	the current value

getAndAccumulate

public final int getAndAccumulate (int i, 
                int x, 
                IntBinaryOperator accumulatorFunction)

Atomically updates the element at index i with the results of applying the given function to the current and given values, returning the previous value. The function should be side-effect-free, since it may be re-applied when attempted updates fail due to contention among threads. The function is applied with the current value at index i as its first argument, and the given update as the second argument.

Parameters
`i`	`int`: the index
`x`	`int`: the update value
`accumulatorFunction`	`IntBinaryOperator`: a side-effect-free function of two arguments

Returns
`int`	the previous value

getAndAdd

public final int getAndAdd (int i, 
                int delta)

Atomically adds the given value to the element at index i.

Parameters
`i`	`int`: the index
`delta`	`int`: the value to add

Returns
`int`	the previous value

getAndDecrement

public final int getAndDecrement (int i)

Atomically decrements by one the element at index i.

Parameters
`i`	`int`: the index

Returns
`int`	the previous value

getAndIncrement

public final int getAndIncrement (int i)

Atomically increments by one the element at index i.

Parameters
`i`	`int`: the index

Returns
`int`	the previous value

getAndSet

public final int getAndSet (int i, 
                int newValue)

Atomically sets the element at position i to the given value and returns the old value.

Parameters
`i`	`int`: the index
`newValue`	`int`: the new value

Returns
`int`	the previous value

getAndUpdate

public final int getAndUpdate (int i, 
                IntUnaryOperator updateFunction)

Atomically updates the element at index i with the results of applying the given function, returning the previous value. The function should be side-effect-free, since it may be re-applied when attempted updates fail due to contention among threads.

Parameters
`i`	`int`: the index
`updateFunction`	`IntUnaryOperator`: a side-effect-free function

Returns
`int`	the previous value

incrementAndGet

public final int incrementAndGet (int i)

Atomically increments by one the element at index i.

Parameters
`i`	`int`: the index

Returns
`int`	the updated value

lazySet

public final void lazySet (int i, 
                int newValue)

Eventually sets the element at position i to the given value.

Parameters
`i`	`int`: the index
`newValue`	`int`: the new value

length

public final int length ()

Returns the length of the array.

Returns
`int`	the length of the array

set

public final void set (int i, 
                int newValue)

Sets the element at position i to the given value.

Parameters
`i`	`int`: the index
`newValue`	`int`: the new value

toString

public String toString ()

Returns the String representation of the current values of array.

Returns
`String`	the String representation of the current values of array

updateAndGet

public final int updateAndGet (int i, 
                IntUnaryOperator updateFunction)

Atomically updates the element at index i with the results of applying the given function, returning the updated value. The function should be side-effect-free, since it may be re-applied when attempted updates fail due to contention among threads.

Parameters
`i`	`int`: the index
`updateFunction`	`IntUnaryOperator`: a side-effect-free function

Returns
`int`	the updated value

weakCompareAndSet

public final boolean weakCompareAndSet (int i, 
                int expect, 
                int update)

Atomically sets the element at position i 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
`i`	`int`: the index
`expect`	`int`: the expected value
`update`	`int`: the new value

Returns
`boolean`	`true` if successful