Build 1.0_r1(from source)

java.util.concurrent.atomic
Class AtomicIntegerArray

java.lang.Object
  extended by 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
AtomicIntegerArray(int length)
          Create a new AtomicIntegerArray of given length.
AtomicIntegerArray(int[] array)
          Create a new AtomicIntegerArray with the same length as, and all elements copied from, the given array.
 
Method Summary
 int addAndGet(int i, int delta)
          Atomically add the given value to element at index i.
 boolean compareAndSet(int i, int expect, int update)
          Atomically set the value to the given updated value if the current value == the expected value.
 int decrementAndGet(int i)
          Atomically decrement by one the element at index i.
 int get(int i)
          Get the current value at position i.
 int getAndAdd(int i, int delta)
          Atomically add the given value to element at index i.
 int getAndDecrement(int i)
          Atomically decrement by one the element at index i.
 int getAndIncrement(int i)
          Atomically increment by one the element at index i.
 int getAndSet(int i, int newValue)
          Set the element at position i to the given value and return the old value.
 int incrementAndGet(int i)
          Atomically increment by one the element at index i.
 int length()
          Returns the length of the array.
 void set(int i, int newValue)
          Set 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, int expect, int update)
          Atomically set the value 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)
Create a new AtomicIntegerArray of given length.

Parameters:
length - the length of the array

AtomicIntegerArray

public AtomicIntegerArray(int[] array)
Create 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)
Get the current value at position i.

Parameters:
i - the index
Returns:
the current value

set

public final void set(int i,
                      int newValue)
Set the element at position i to the given value.

Parameters:
i - the index
newValue - the new value

getAndSet

public final int getAndSet(int i,
                           int newValue)
Set the element at position i to the given value and return 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 set the value 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 set the value to the given updated value if the current value == the expected value. May fail spuriously.

Parameters:
i - the index
expect - the expected value
update - the new value
Returns:
true if successful.

getAndIncrement

public final int getAndIncrement(int i)
Atomically increment by one the element at index i.

Parameters:
i - the index
Returns:
the previous value;

getAndDecrement

public final int getAndDecrement(int i)
Atomically decrement 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 add the given value to 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 increment by one the element at index i.

Parameters:
i - the index
Returns:
the updated value;

decrementAndGet

public final int decrementAndGet(int i)
Atomically decrement 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 add the given value to 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.

Build 1.0_r1(from source)

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