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java.lang.Objectjava.lang.Number
java.util.concurrent.atomic.AtomicLong
public class AtomicLong
Disabled: no SafeJ information.
A long
value that may be updated atomically. See the
java.util.concurrent.atomic
package specification for
description of the properties of atomic variables. An
AtomicLong
is used in applications such as atomically
incremented sequence numbers, and cannot be used as a replacement
for a Long
. However, this class does extend
Number
to allow uniform access by tools and utilities that
deal with numerically-based classes.
Constructor Summary | |
---|---|
AtomicLong()
Creates a new AtomicLong with initial value 0 . |
|
AtomicLong(long initialValue)
Creates a new AtomicLong with the given initial value. |
Method Summary | |
---|---|
long |
addAndGet(long delta)
Atomically adds the given value to the current value. |
boolean |
compareAndSet(long expect,
long update)
Atomically sets the value to the given updated value if the current value == the expected value. |
long |
decrementAndGet()
Atomically decrements by one the current value. |
double |
doubleValue()
Returns the value of the specified number as a double . |
float |
floatValue()
Returns the value of the specified number as a float . |
long |
get()
Gets the current value. |
long |
getAndAdd(long delta)
Atomically adds the given value to the current value. |
long |
getAndDecrement()
Atomically decrements by one the current value. |
long |
getAndIncrement()
Atomically increments by one the current value. |
long |
getAndSet(long newValue)
Atomically sets to the given value and returns the old value. |
long |
incrementAndGet()
Atomically increments by one the current value. |
int |
intValue()
Returns the value of the specified number as an int . |
void |
lazySet(long newValue)
Eventually sets to the given value. |
long |
longValue()
Returns the value of the specified number as a long . |
void |
set(long newValue)
Sets to the given value. |
String |
toString()
Returns the String representation of the current value. |
boolean |
weakCompareAndSet(long expect,
long update)
Atomically sets the value to the given updated value if the current value == the expected value. |
Methods inherited from class java.lang.Number |
---|
byteValue, shortValue |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
---|
public AtomicLong(long initialValue)
initialValue
- the initial valuepublic AtomicLong()
0
.
Method Detail |
---|
public final long get()
public final void set(long newValue)
newValue
- the new valuepublic final void lazySet(long newValue)
newValue
- the new valuepublic final long getAndSet(long newValue)
newValue
- the new value
public final boolean compareAndSet(long expect, long update)
==
the expected value.
expect
- the expected valueupdate
- the new value
public final boolean weakCompareAndSet(long expect, long update)
==
the expected value.
May fail spuriously
and does not provide ordering guarantees, so is only rarely an
appropriate alternative to compareAndSet
.
expect
- the expected valueupdate
- the new value
public final long getAndIncrement()
public final long getAndDecrement()
public final long getAndAdd(long delta)
delta
- the value to add
public final long incrementAndGet()
public final long decrementAndGet()
public final long addAndGet(long delta)
delta
- the value to add
public String toString()
toString
in class Object
public int intValue()
Number
int
.
This may involve rounding or truncation.
intValue
in class Number
int
.public long longValue()
Number
long
.
This may involve rounding or truncation.
longValue
in class Number
long
.public float floatValue()
Number
float
.
This may involve rounding.
floatValue
in class Number
float
.public double doubleValue()
Number
double
.
This may involve rounding.
doubleValue
in class Number
double
.
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