java.util.concurrent.atomic.AtomicInteger
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.
Summary
Public Constructors
Public Methods
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait
Details
Public Constructors
public
AtomicInteger(int initialValue)
Create a new AtomicInteger with the given initial value.
Parameters
initialValue
| the initial value
|
public
AtomicInteger()
Create a new AtomicInteger with initial value 0.
Public Methods
public
final
int
addAndGet(int delta)
Atomically add the given value to current value.
public
final
boolean
compareAndSet(int expect, int update)
Atomically set the value to the given updated value
if the current value
== the expected value.
Parameters
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.
public
final
int
decrementAndGet()
Atomically decrement by one the current value.
public
double
doubleValue()
Returns the double value which the receiver represents
Returns
- double the value of the receiver.
public
float
floatValue()
Returns the float value which the receiver represents
Returns
- float the value of the receiver.
public
final
int
getAndAdd(int delta)
Atomically add the given value to current value.
public
final
int
getAndDecrement()
Atomically decrement by one the current value.
public
final
int
getAndIncrement()
Atomically increment by one the current value.
public
final
int
getAndSet(int newValue)
Set to the give value and return the old value.
public
final
int
incrementAndGet()
Atomically increment by one the current value.
public
int
intValue()
Returns the int value which the receiver represents
Returns
- int the value of the receiver.
public
long
longValue()
Returns the long value which the receiver represents
Returns
- long the value of the receiver.
public
final
void
set(int newValue)
public
String
toString()
Returns the String representation of the current value.
Returns
- the String representation of the current value.
public
final
boolean
weakCompareAndSet(int expect, int update)
Atomically set the value to the given updated value
if the current value
== the expected value.
May fail spuriously.
Parameters
expect
| the expected value |
update
| the new value |