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java.lang.Object![]()
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java.lang.Number
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java.util.concurrent.atomic.AtomicLong
public class AtomicLong
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 | |
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AtomicLong
Create a new AtomicLong with initial value 0. |
|
AtomicLong
Create a new AtomicLong with the given initial value. |
Method Summary | |
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long |
addAndGet
Atomically add the given value to current value. |
boolean |
compareAndSet
Atomically set the value to the given updated value if the current value == the expected value. |
long |
decrementAndGet
Atomically decrement 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
Get the current value. |
long |
getAndAdd
Atomically add the given value to current value. |
long |
getAndDecrement
Atomically decrement by one the current value. |
long |
getAndIncrement
Atomically increment by one the current value. |
long |
getAndSet
Set to the give value and return the old value. |
long |
incrementAndGet
Atomically increment by one the current value. |
int |
intValue
Returns the value of the specified number as an int . |
long |
longValue
Returns the value of the specified number as a long . |
void |
set
Set to the given value. |
String |
toString
Returns the String representation of the current value. |
boolean |
weakCompareAndSet
Atomically set the value to the given updated value if the current value == the expected value. |
Methods inherited from class java.lang.Number ![]() ![]() ![]() |
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byteValue |
Methods inherited from class java.lang.Object ![]() ![]() ![]() |
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clone |
Constructor Detail |
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public AtomicLong(long initialValue)
initialValue
- the initial valuepublic AtomicLong()
Method Detail |
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public final long get()
public final void set(long newValue)
newValue
- the new valuepublic final long getAndSet(long newValue)
newValue
- the new value
public final boolean compareAndSet(long expect, long update)
expect
- the expected valueupdate
- the new value
public final boolean weakCompareAndSet(long expect, long update)
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![]()
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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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