AtomicLongArray (Java Platform SE 8 )

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

All Implemented Interfaces:

Serializable
```
public class AtomicLongArray
extends Object
implements Serializable
```
A long 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
`AtomicLongArray(int length)`	Creates a new AtomicLongArray of the given length, with all elements initially zero.
`AtomicLongArray(long[] array)`	Creates a new AtomicLongArray 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
`long`	`accumulateAndGet(int i, long x, LongBinaryOperator 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.
`long`	`addAndGet(int i, long delta)`	Atomically adds the given value to the element at index `i`.
`boolean`	`compareAndSet(int i, long expect, long update)`	Atomically sets the element at position `i` to the given updated value if the current value `==` the expected value.
`long`	`decrementAndGet(int i)`	Atomically decrements by one the element at index `i`.
`long`	`get(int i)`	Gets the current value at position `i`.
`long`	`getAndAccumulate(int i, long x, LongBinaryOperator 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.
`long`	`getAndAdd(int i, long delta)`	Atomically adds the given value to the element at index `i`.
`long`	`getAndDecrement(int i)`	Atomically decrements by one the element at index `i`.
`long`	`getAndIncrement(int i)`	Atomically increments by one the element at index `i`.
`long`	`getAndSet(int i, long newValue)`	Atomically sets the element at position `i` to the given value and returns the old value.
`long`	`getAndUpdate(int i, LongUnaryOperator updateFunction)`	Atomically updates the element at index `i` with the results of applying the given function, returning the previous value.
`long`	`incrementAndGet(int i)`	Atomically increments by one the element at index `i`.
`void`	`lazySet(int i, long newValue)`	Eventually sets the element at position `i` to the given value.
`int`	`length()`	Returns the length of the array.
`void`	`set(int i, long newValue)`	Sets the element at position `i` to the given value.
`String`	`toString()`	Returns the String representation of the current values of array.
`long`	`updateAndGet(int i, LongUnaryOperator updateFunction)`	Atomically updates the element at index `i` with the results of applying the given function, returning the updated value.
`boolean`	`weakCompareAndSet(int i, long expect, long 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
  - AtomicLongArray
```
public AtomicLongArray(int length)
```
    Creates a new AtomicLongArray of the given length, with all elements initially zero.
    
    Parameters:
    
    length - the length of the array
  - AtomicLongArray
```
public AtomicLongArray(long[] array)
```
    Creates a new AtomicLongArray 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 long 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,
                      long 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,
                          long 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 long getAndSet(int i,
                            long 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,
                                   long expect,
                                   long 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,
                                       long expect,
                                       long 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 long getAndIncrement(int i)
```
    Atomically increments by one the element at index i.
    
    Parameters:
    
    i - the index
    
    Returns:
    
    the previous value
  - getAndDecrement
```
public final long getAndDecrement(int i)
```
    Atomically decrements by one the element at index i.
    
    Parameters:
    
    i - the index
    
    Returns:
    
    the previous value
  - getAndAdd
```
public final long getAndAdd(int i,
                            long 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 long incrementAndGet(int i)
```
    Atomically increments by one the element at index i.
    
    Parameters:
    
    i - the index
    
    Returns:
    
    the updated value
  - decrementAndGet
```
public final long decrementAndGet(int i)
```
    Atomically decrements by one the element at index i.
    
    Parameters:
    
    i - the index
    
    Returns:
    
    the updated value
  - addAndGet
```
public long addAndGet(int i,
                      long 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 long getAndUpdate(int i,
                               LongUnaryOperator 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 long updateAndGet(int i,
                               LongUnaryOperator 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 long getAndAccumulate(int i,
                                   long x,
                                   LongBinaryOperator 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 long accumulateAndGet(int i,
                                   long x,
                                   LongBinaryOperator 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 AtomicLongArray

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

AtomicLongArray

AtomicLongArray

Method Detail

length

get

set

lazySet

getAndSet

compareAndSet

weakCompareAndSet

getAndIncrement

getAndDecrement

getAndAdd

incrementAndGet

decrementAndGet

addAndGet

getAndUpdate

updateAndGet

getAndAccumulate

accumulateAndGet

toString