AtomicDoubleArray (Guava: Google Core Libraries for Java 19.0 API)

java.lang.Object
- com.google.common.util.concurrent.AtomicDoubleArray

All Implemented Interfaces:

Serializable
```
public class AtomicDoubleArray
extends Object
implements Serializable
```
A double array in which elements may be updated atomically. See the java.util.concurrent.atomic package specification for description of the properties of atomic variables.
This class compares primitive double values in methods such as compareAndSet(int, double, double) by comparing their bitwise representation using Double.doubleToRawLongBits(double), which differs from both the primitive double == operator and from Double.equals(java.lang.Object), as if implemented by:
```
 static boolean bitEquals(double x, double y) {
   long xBits = Double.doubleToRawLongBits(x);
   long yBits = Double.doubleToRawLongBits(y);
   return xBits == yBits;
 }
```
Since:

11.0

Author:

Doug Lea, Martin Buchholz

See Also:
Serialized Form

Constructor Summary

Constructors
Constructor and Description
`AtomicDoubleArray(double[] array)` Creates a new `AtomicDoubleArray` with the same length as, and all elements copied from, the given array.
`AtomicDoubleArray(int length)` Creates a new `AtomicDoubleArray` of the given length, with all elements initially zero.

Method Summary

Methods
Modifier and Type	Method and Description
`double`	`addAndGet(int i, double delta)` Atomically adds the given value to the element at index `i`.
`boolean`	`compareAndSet(int i, double expect, double update)` Atomically sets the element at position `i` to the given updated value if the current value is bitwise equal to the expected value.
`double`	`get(int i)` Gets the current value at position `i`.
`double`	`getAndAdd(int i, double delta)` Atomically adds the given value to the element at index `i`.
`double`	`getAndSet(int i, double newValue)` Atomically sets the element at position `i` to the given value and returns the old value.
`void`	`lazySet(int i, double newValue)` Eventually sets the element at position `i` to the given value.
`int`	`length()` Returns the length of the array.
`void`	`set(int i, double newValue)` Sets the element at position `i` to the given value.
`String`	`toString()` Returns the String representation of the current values of array.
`boolean`	`weakCompareAndSet(int i, double expect, double update)` Atomically sets the element at position `i` to the given updated value if the current value is bitwise equal to the expected value.

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

- Constructor Detail
  - AtomicDoubleArray
```
public AtomicDoubleArray(int length)
```
    Creates a new AtomicDoubleArray of the given length, with all elements initially zero.
    
    Parameters:
    length - the length of the array
  - AtomicDoubleArray
```
public AtomicDoubleArray(double[] array)
```
    Creates a new AtomicDoubleArray 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 double 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,
       double 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,
           double newValue)
```
    Eventually sets the element at position i to the given value.
    
    Parameters:
    i - the index
    newValue - the new value
  - getAndSet
```
public final double getAndSet(int i,
               double 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,
                    double expect,
                    double update)
```
    Atomically sets the element at position i to the given updated value if the current value is bitwise equal to 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,
                        double expect,
                        double update)
```
    Atomically sets the element at position i to the given updated value if the current value is bitwise equal to 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
  - getAndAdd
```
public final double getAndAdd(int i,
               double 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
  - addAndGet
```
public double addAndGet(int i,
               double 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
  - 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

Class AtomicDoubleArray

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

AtomicDoubleArray

AtomicDoubleArray

Method Detail

length

get

set

lazySet

getAndSet

compareAndSet

weakCompareAndSet

getAndAdd

addAndGet

toString