AtomicInteger JDK 1.6)

Description

public class AtomicInteger

An int value that may be updated atomically.

An int value that may be updated atomically. See the
java.util.concurrent.atomic package specification for
description of the properties of atomic variables. An
AtomicInteger is used in applications such as atomically
incremented counters, and cannot be used as a replacement for an
Integer. However, this class does extend
Number to allow uniform access by tools and utilities that
deal with numerically-based classes.

See also:

Methods

Hide/Show inherited methods

publicfinal int addAndGet (int delta)

Atomically adds the given value to the current value.

public byte byteValue () [Inherited From Number]

Returns the value of the specified number as a byte.

Returns the value of the specified number as a byte.
This may involve rounding or truncation.
Returns: the numeric value represented by this object after conversion to type byte.
Since: JDK1.1

publicfinal boolean compareAndSet (int expect, int update)

Atomically sets the value to the given updated value if the current value == the expected value.

Atomically sets the value to the given updated value
if the current value == the expected value.
Returns: true if successful. False return indicates that the actual value was not equal to the expected value.
Parameters:
- expect - the expected value
- update - the new value

publicfinal int decrementAndGet ()

Atomically decrements by one the current value.

public double doubleValue () [Specified in Number]

public float floatValue () [Specified in Number]

publicfinal int get ()

Gets the current value.

publicfinal int getAndAdd (int delta)

Atomically adds the given value to the current value.

publicfinal int getAndDecrement ()

Atomically decrements by one the current value.

publicfinal int getAndIncrement ()

Atomically increments by one the current value.

publicfinal int getAndSet (int newValue)

Atomically sets to the given value and returns the old value.

publicfinal int incrementAndGet ()

Atomically increments by one the current value.

public int intValue () [Specified in Number]

publicfinal void lazySet (int newValue)

Eventually sets to the given value.

public long longValue () [Specified in Number]

publicfinal void set (int newValue)

Sets to the given value.

public short shortValue () [Inherited From Number]

Returns the value of the specified number as a short.

Returns the value of the specified number as a short.
This may involve rounding or truncation.
Returns: the numeric value represented by this object after conversion to type short.
Since: JDK1.1

public String toString ()

Returns the String representation of the current value.

publicfinal boolean weakCompareAndSet (int expect, int update)

Atomically sets the value 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.
Returns: true if successful.
Parameters:
- expect - the expected value
- update - the new value