AtomicIntegerArray (Java Platform SE 8 )

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

All Implemented Interfaces:

Serializable
```
public class AtomicIntegerArray
extends Object
implements Serializable
```
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.

Since:

1.5

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor	Description
`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.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`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.
`int`	`addAndGet(int i, int delta)`	Atomically adds the given value to the element at index `i`.
`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.
`int`	`decrementAndGet(int i)`	Atomically decrements by one the element at index `i`.
`int`	`get(int i)`	Gets the current value at position `i`.
`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.
`int`	`getAndAdd(int i, int delta)`	Atomically adds the given value to the element at index `i`.
`int`	`getAndDecrement(int i)`	Atomically decrements by one the element at index `i`.
`int`	`getAndIncrement(int i)`	Atomically increments by one the element at index `i`.
`int`	`getAndSet(int i, int newValue)`	Atomically sets the element at position `i` to the given value and returns the old value.
`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.
`int`	`incrementAndGet(int i)`	Atomically increments by one the element at index `i`.
`void`	`lazySet(int i, int newValue)`	Eventually sets the element at position `i` to the given value.
`int`	`length()`	Returns the length of the array.
`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.
`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.
`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.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - AtomicIntegerArray
```
public AtomicIntegerArray(int length)
```
    Creates a new AtomicIntegerArray of the given length, with all elements initially zero.
    
    Parameters:
    
    length - 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 - the array to copy elements from
    
    Throws:
    
    NullPointerException - if array is null
- Method Detail
  - length
```
public final int length()
```
    Returns the length of the array.
    
    Returns:
    
    the length of the array
  - get
```
public final int get(int i)
```
    Gets the current value at position i.
    
    Parameters:
    
    i - the index
    
    Returns:
    
    the current value
  - set
```
public final void set(int i,
                      int newValue)
```
    Sets the element at position i to the given value.
    
    Parameters:
    
    i - the index
    
    newValue - the new value
  - lazySet
```
public final void lazySet(int i,
                          int newValue)
```
    Eventually sets the element at position i to the given value.
    
    Parameters:
    
    i - the index
    
    newValue - the new value
    
    Since:
    
    1.6
  - 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 - the index
    
    newValue - the new value
    
    Returns:
    
    the previous 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 - the index
    
    expect - the expected value
    
    update - the new value
    
    Returns:
    
    true if successful. False return indicates that the actual value was not equal to the expected 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 - the index
    
    expect - the expected value
    
    update - the new value
    
    Returns:
    
    true if successful
  - getAndIncrement
```
public final int getAndIncrement(int i)
```
    Atomically increments by one the element at index i.
    
    Parameters:
    
    i - the index
    
    Returns:
    
    the previous value
  - getAndDecrement
```
public final int getAndDecrement(int i)
```
    Atomically decrements by one the element at index i.
    
    Parameters:
    
    i - the index
    
    Returns:
    
    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 - the index
    
    delta - the value to add
    
    Returns:
    
    the previous value
  - incrementAndGet
```
public final int incrementAndGet(int i)
```
    Atomically increments by one the element at index i.
    
    Parameters:
    
    i - the index
    
    Returns:
    
    the updated value
  - decrementAndGet
```
public final int decrementAndGet(int i)
```
    Atomically decrements by one the element at index i.
    
    Parameters:
    
    i - the index
    
    Returns:
    
    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 - the index
    
    delta - the value to add
    
    Returns:
    
    the updated 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 - the index
    
    updateFunction - a side-effect-free function
    
    Returns:
    
    the previous value
    
    Since:
    
    1.8
  - 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 - the index
    
    updateFunction - a side-effect-free function
    
    Returns:
    
    the updated value
    
    Since:
    
    1.8
  - 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 - the index
    
    x - the update value
    
    accumulatorFunction - a side-effect-free function of two arguments
    
    Returns:
    
    the previous value
    
    Since:
    
    1.8
  - 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 - the index
    
    x - the update value
    
    accumulatorFunction - a side-effect-free function of two arguments
    
    Returns:
    
    the updated value
    
    Since:
    
    1.8
  - toString
```
public String toString()
```
    Returns the String representation of the current values of array.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    the String representation of the current values of array

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Class AtomicIntegerArray

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

AtomicIntegerArray

AtomicIntegerArray

Method Detail

length

get

set

lazySet

getAndSet

compareAndSet

weakCompareAndSet

getAndIncrement

getAndDecrement

getAndAdd

incrementAndGet

decrementAndGet

addAndGet

getAndUpdate

updateAndGet

getAndAccumulate

accumulateAndGet

toString