Android APIs
public class

AtomicLongArray

extends Object
implements Serializable
java.lang.Object
   ↳ java.util.concurrent.atomic.AtomicLongArray

Class Overview

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.

Summary

Public Constructors
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.
Public Methods
long addAndGet(int i, long delta)
Atomically adds the given value to the element at index i.
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.
final long decrementAndGet(int i)
Atomically decrements by one the element at index i.
final long get(int i)
Gets the current value at position i.
final long getAndAdd(int i, long delta)
Atomically adds the given value to the element at index i.
final long getAndDecrement(int i)
Atomically decrements by one the element at index i.
final long getAndIncrement(int i)
Atomically increments by one the element at index i.
final long getAndSet(int i, long newValue)
Atomically sets the element at position i to the given value and returns the old value.
final long incrementAndGet(int i)
Atomically increments by one the element at index i.
final void lazySet(int i, long 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, long newValue)
Sets the element at position i to the given value.
String toString()
Returns the String representation of the current values of array.
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.
[Expand]
Inherited Methods
From class java.lang.Object

Public Constructors

public AtomicLongArray (int length)

Added in API level 1

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

Parameters
length int: the length of the array

public AtomicLongArray (long[] array)

Added in API level 1

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

Parameters
array long: the array to copy elements from
Throws
NullPointerException if array is null

Public Methods

public long addAndGet (int i, long delta)

Added in API level 1

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

Parameters
i int: the index
delta long: the value to add
Returns
long the updated value

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

Added in API level 1

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 long: the expected value
update long: the new value
Returns
boolean true if successful. False return indicates that the actual value was not equal to the expected value.

public final long decrementAndGet (int i)

Added in API level 1

Atomically decrements by one the element at index i.

Parameters
i int: the index
Returns
long the updated value

public final long get (int i)

Added in API level 1

Gets the current value at position i.

Parameters
i int: the index
Returns
long the current value

public final long getAndAdd (int i, long delta)

Added in API level 1

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

Parameters
i int: the index
delta long: the value to add
Returns
long the previous value

public final long getAndDecrement (int i)

Added in API level 1

Atomically decrements by one the element at index i.

Parameters
i int: the index
Returns
long the previous value

public final long getAndIncrement (int i)

Added in API level 1

Atomically increments by one the element at index i.

Parameters
i int: the index
Returns
long the previous value

public final long getAndSet (int i, long newValue)

Added in API level 1

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

Parameters
i int: the index
newValue long: the new value
Returns
long the previous value

public final long incrementAndGet (int i)

Added in API level 1

Atomically increments by one the element at index i.

Parameters
i int: the index
Returns
long the updated value

public final void lazySet (int i, long newValue)

Added in API level 9

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

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

public final int length ()

Added in API level 1

Returns the length of the array.

Returns
int the length of the array

public final void set (int i, long newValue)

Added in API level 1

Sets the element at position i to the given value.

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

public String toString ()

Added in API level 1

Returns the String representation of the current values of array.

Returns
String the String representation of the current values of array

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

Added in API level 1

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 long: the expected value
update long: the new value
Returns
boolean true if successful