Package Summary  Overview Summary

class:AtomicLong [CHANGED]
  • All Implemented Interfaces:
    Serializable 

    public class AtomicLong
extends Number
implements Serializable
    A long value that may be updated atomically. See the java.util.concurrent.atomic packageVarHandle specification for descriptiondescriptions of the properties of atomic variablesaccesses. 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.
    Since:
    1.5
    See Also:
    Serialized Form
  • All Implemented Interfaces:
    Serializable 

    public class AtomicLong
extends Number
implements Serializable
    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.
    Since:
    1.5
    See Also:
    Serialized Form
  • All Implemented Interfaces:
    Serializable 

    public class AtomicLong
extends Number
implements Serializable
    A long value that may be updated atomically. See the VarHandle specification for descriptions of the properties of atomic accesses. 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.
    Since:
    1.5
    See Also:
    Serialized Form

constructor:AtomicLong(long) [NONE]

  • AtomicLong

    public AtomicLong(long initialValue)
    Creates a new AtomicLong with the given initial value.
    Parameters:
    initialValue - the initial value

constructor:AtomicLong() [NONE]

  • AtomicLong

    public AtomicLong()
    Creates a new AtomicLong with initial value 0.

method:get() [CHANGED]

  • get

    public final long get()
    Gets the current value.
    Returns:
    the current value

method:set(long) [CHANGED]

  • set

    public final void set(long newValue)
    Sets to the given value.
    Parameters:
    newValue - the new value

method:lazySet(long) [CHANGED]

  • lazySet

    public final void lazySet(long newValue)
    Eventually sets toSets the givenvalue to newValue, with memory effects as specified by VarHandle.setRelease(java.lang.Object...).
    Parameters:
    newValue - the new value
    Since:
    1.6

  • lazySet

    public final void lazySet(long newValue)
    Eventually sets to the given value.
    Parameters:
    newValue - the new value
    Since:
    1.6

  • lazySet

    public final void lazySet(long newValue)
    Sets the value to newValue, with memory effects as specified by VarHandle.setRelease(java.lang.Object...).
    Parameters:
    newValue - the new value
    Since:
    1.6

method:getAndSet(long) [CHANGED]

  • getAndSet

    public final long getAndSet(long newValue)
    Atomically sets tothe givenvalue to newValue and returns the old value, with memory effects as specified by VarHandle.getAndSet(java.lang.Object...).
    Parameters:
    newValue - the new value
    Returns:
    the previous value

  • getAndSet

    public final long getAndSet(long newValue)
    Atomically sets to the given value and returns the old value.
    Parameters:
    newValue - the new value
    Returns:
    the previous value

  • getAndSet

    public final long getAndSet(long newValue)
    Atomically sets the value to newValue and returns the old value, with memory effects as specified by VarHandle.getAndSet(java.lang.Object...).
    Parameters:
    newValue - the new value
    Returns:
    the previous value

method:compareAndSet(long, long) [CHANGED]

  • compareAndSet

    public final boolean compareAndSet(long expectlong expectedValue,
                                   long updatelong newValue)
    Atomically sets the value to the given updated valuenewValue if the current value == the expected valueexpectedValue , with memory effects as specified by VarHandle.compareAndSet(java.lang.Object...).
    Parameters:
    expectexpectedValue - the expected value
    updatenewValue - the new value
    Returns:
    true if successful. False return indicates that the actual value was not equal to the expected value.

  • compareAndSet

    public final boolean compareAndSet(long expect,
                                   long update)
    Atomically sets 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.

  • compareAndSet

    public final boolean compareAndSet(long expectedValue,
                                   long newValue)
    Atomically sets the value to newValue if the current value == expectedValue , with memory effects as specified by VarHandle.compareAndSet(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    true if successful. False return indicates that the actual value was not equal to the expected value.

method:weakCompareAndSet(long, long) [CHANGED]

  • weakCompareAndSet

    public final boolean weakCompareAndSet(long expect,
                                       long 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.

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

method:weakCompareAndSetPlain(long, long) [ADDED]

  • weakCompareAndSetPlain 

    public final boolean weakCompareAndSetPlain(long expectedValue,
                                            long newValue)
    Possibly atomically sets the value to newValue if the current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSetPlain(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    true if successful
    Since:
    9

method:getAndIncrement() [CHANGED]

  • getAndIncrement

    public final long getAndIncrement()
    Atomically increments by onethe current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).

    Equivalent to getAndAdd(1).

    Returns:
    the previous value

  • getAndIncrement

    public final long getAndIncrement()
    Atomically increments by one the current value.
    Returns:
    the previous value

  • getAndIncrement

    public final long getAndIncrement()
    Atomically increments the current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).

    Equivalent to getAndAdd(1).

    Returns:
    the previous value

method:getAndDecrement() [CHANGED]

  • getAndDecrement

    public final long getAndDecrement()
    Atomically decrements by onethe current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).

    Equivalent to getAndAdd(-1).

    Returns:
    the previous value

  • getAndDecrement

    public final long getAndDecrement()
    Atomically decrements by one the current value.
    Returns:
    the previous value

  • getAndDecrement

    public final long getAndDecrement()
    Atomically decrements the current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).

    Equivalent to getAndAdd(-1).

    Returns:
    the previous value

method:getAndAdd(long) [CHANGED]

  • getAndAdd

    public final long getAndAdd(long delta)
    Atomically adds the given value to the current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).
    Parameters:
    delta - the value to add
    Returns:
    the previous value

  • getAndAdd

    public final long getAndAdd(long delta)
    Atomically adds the given value to the current value.
    Parameters:
    delta - the value to add
    Returns:
    the previous value

  • getAndAdd

    public final long getAndAdd(long delta)
    Atomically adds the given value to the current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).
    Parameters:
    delta - the value to add
    Returns:
    the previous value

method:incrementAndGet() [CHANGED]

  • incrementAndGet

    public final long incrementAndGet()
    Atomically increments by onethe current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).

    Equivalent to addAndGet(1).

    Returns:
    the updated value

  • incrementAndGet

    public final long incrementAndGet()
    Atomically increments by one the current value.
    Returns:
    the updated value

  • incrementAndGet

    public final long incrementAndGet()
    Atomically increments the current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).

    Equivalent to addAndGet(1).

    Returns:
    the updated value

method:decrementAndGet() [CHANGED]

  • decrementAndGet

    public final long decrementAndGet()
    Atomically decrements by onethe current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).

    Equivalent to addAndGet(-1).

    Returns:
    the updated value

  • decrementAndGet

    public final long decrementAndGet()
    Atomically decrements by one the current value.
    Returns:
    the updated value

  • decrementAndGet

    public final long decrementAndGet()
    Atomically decrements the current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).

    Equivalent to addAndGet(-1).

    Returns:
    the updated value

method:addAndGet(long) [CHANGED]

  • addAndGet

    public final long addAndGet(long delta)
    Atomically adds the given value to the current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).
    Parameters:
    delta - the value to add
    Returns:
    the updated value

  • addAndGet

    public final long addAndGet(long delta)
    Atomically adds the given value to the current value.
    Parameters:
    delta - the value to add
    Returns:
    the updated value

  • addAndGet

    public final long addAndGet(long delta)
    Atomically adds the given value to the current value, with memory effects as specified by VarHandle.getAndAdd(java.lang.Object...).
    Parameters:
    delta - the value to add
    Returns:
    the updated value

method:getAndUpdate(java.util.function.LongUnaryOperator) [NONE]

  • getAndUpdate

    public final long getAndUpdate(LongUnaryOperator updateFunction)
    Atomically updates the current value with the results of applying the given function, returning the previous value. The function should be side-effect-free, since it may be re-applied when attempted updates fail due to contention among threads.
    Parameters:
    updateFunction - a side-effect-free function
    Returns:
    the previous value
    Since:
    1.8

method:updateAndGet(java.util.function.LongUnaryOperator) [NONE]

  • updateAndGet

    public final long updateAndGet(LongUnaryOperator updateFunction)
    Atomically updates the current value with the results of applying the given function, returning the updated value. The function should be side-effect-free, since it may be re-applied when attempted updates fail due to contention among threads.
    Parameters:
    updateFunction - a side-effect-free function
    Returns:
    the updated value
    Since:
    1.8

method:getAndAccumulate(long, java.util.function.LongBinaryOperator) [NONE]

  • getAndAccumulate

    public final long getAndAccumulate(long x,
                                   LongBinaryOperator accumulatorFunction)
    Atomically updates the current value with the results of applying the given function to the current and given values, returning the previous value. The function should be side-effect-free, since it may be re-applied when attempted updates fail due to contention among threads. The function is applied with the current value as its first argument, and the given update as the second argument.
    Parameters:
    x - the update value
    accumulatorFunction - a side-effect-free function of two arguments
    Returns:
    the previous value
    Since:
    1.8

method:accumulateAndGet(long, java.util.function.LongBinaryOperator) [NONE]

  • accumulateAndGet

    public final long accumulateAndGet(long x,
                                   LongBinaryOperator accumulatorFunction)
    Atomically updates the current value with the results of applying the given function to the current and given values, returning the updated value. The function should be side-effect-free, since it may be re-applied when attempted updates fail due to contention among threads. The function is applied with the current value as its first argument, and the given update as the second argument.
    Parameters:
    x - the update value
    accumulatorFunction - a side-effect-free function of two arguments
    Returns:
    the updated value
    Since:
    1.8

method:toString() [NONE]

  • toString

    public String toString()
    Returns the String representation of the current value.
    Overrides:
    toString in class Object
    Returns:
    the String representation of the current value

method:intValue() [CHANGED]

  • intValue

    public int intValue()
    Returns the current value of this AtomicLong as an int after a narrowing primitive conversion, with memory effects as specified by VarHandle.getVolatile(java.lang.Object...).
    Specified by:
    intValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type int.
    See The Java™ Language Specification :
    5.1.3 Narrowing Primitive Conversions

  • intValue

    public int intValue()
    Returns the value of this AtomicLong as an int after a narrowing primitive conversion.
    Specified by:
    intValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type int.
    See The Java™ Language Specification :
    5.1.3 Narrowing Primitive Conversions

  • intValue

    public int intValue()
    Returns the current value of this AtomicLong as an int after a narrowing primitive conversion, with memory effects as specified by VarHandle.getVolatile(java.lang.Object...).
    Specified by:
    intValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type int.
    See The Java™ Language Specification :
    5.1.3 Narrowing Primitive Conversions

method:longValue() [CHANGED]

  • longValue

    public long longValue()
    Returns the current value of this AtomicLong as a long, with memory effects as specified by VarHandle.getVolatile(java.lang.Object...). Equivalent to get().
    Specified by:
    longValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type long.

  • longValue

    public long longValue()
    Returns the value of this AtomicLong as a long.
    Specified by:
    longValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type long.

  • longValue

    public long longValue()
    Returns the current value of this AtomicLong as a long, with memory effects as specified by VarHandle.getVolatile(java.lang.Object...). Equivalent to get().
    Specified by:
    longValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type long.

method:floatValue() [CHANGED]

  • floatValue

    public float floatValue()
    Returns the current value of this AtomicLong as a float after a widening primitive conversion, with memory effects as specified by VarHandle.getVolatile(java.lang.Object...).
    Specified by:
    floatValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type float.
    See The Java™ Language Specification :
    5.1.2 Widening Primitive Conversions

  • floatValue

    public float floatValue()
    Returns the value of this AtomicLong as a float after a widening primitive conversion.
    Specified by:
    floatValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type float.
    See The Java™ Language Specification :
    5.1.2 Widening Primitive Conversions

  • floatValue

    public float floatValue()
    Returns the current value of this AtomicLong as a float after a widening primitive conversion, with memory effects as specified by VarHandle.getVolatile(java.lang.Object...).
    Specified by:
    floatValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type float.
    See The Java™ Language Specification :
    5.1.2 Widening Primitive Conversions

method:doubleValue() [CHANGED]

  • doubleValue

    public double doubleValue()
    Returns the current value of this AtomicLong as a double after a widening primitive conversion, with memory effects as specified by VarHandle.getVolatile(java.lang.Object...).
    Specified by:
    doubleValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type double.
    See The Java™ Language Specification :
    5.1.2 Widening Primitive Conversions

  • doubleValue

    public double doubleValue()
    Returns the value of this AtomicLong as a double after a widening primitive conversion.
    Specified by:
    doubleValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type double.
    See The Java™ Language Specification :
    5.1.2 Widening Primitive Conversions

  • doubleValue

    public double doubleValue()
    Returns the current value of this AtomicLong as a double after a widening primitive conversion, with memory effects as specified by VarHandle.getVolatile(java.lang.Object...).
    Specified by:
    doubleValue in class Number
    Returns:
    the numeric value represented by this object after conversion to type double.
    See The Java™ Language Specification :
    5.1.2 Widening Primitive Conversions

method:getPlain() [ADDED]

  • getPlain 

    public final long getPlain()
    Returns the current value, with memory semantics of reading as if the variable was declared non-volatile.
    Returns:
    the value
    Since:
    9

method:setPlain(long) [ADDED]

  • setPlain 

    public final void setPlain(long newValue)
    Sets the value to newValue, with memory semantics of setting as if the variable was declared non-volatile and non-final.
    Parameters:
    newValue - the new value
    Since:
    9

method:getOpaque() [ADDED]

method:setOpaque(long) [ADDED]

  • setOpaque 

    public final void setOpaque(long newValue)
    Sets the value to newValue, with memory effects as specified by VarHandle.setOpaque(java.lang.Object...).
    Parameters:
    newValue - the new value
    Since:
    9

method:getAcquire() [ADDED]

method:setRelease(long) [ADDED]

  • setRelease 

    public final void setRelease(long newValue)
    Sets the value to newValue, with memory effects as specified by VarHandle.setRelease(java.lang.Object...).
    Parameters:
    newValue - the new value
    Since:
    9

method:compareAndExchange(long, long) [ADDED]

  • compareAndExchange 

    public final long compareAndExchange(long expectedValue,
                                     long newValue)
    Atomically sets the value to newValue if the current value, referred to as the witness value , == expectedValue , with memory effects as specified by VarHandle.compareAndExchange(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    the witness value, which will be the same as the expected value if successful
    Since:
    9

method:compareAndExchangeAcquire(long, long) [ADDED]

  • compareAndExchangeAcquire 

    public final long compareAndExchangeAcquire(long expectedValue,
                                            long newValue)
    Atomically sets the value to newValue if the current value, referred to as the witness value , == expectedValue , with memory effects as specified by VarHandle.compareAndExchangeAcquire(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    the witness value, which will be the same as the expected value if successful
    Since:
    9

method:compareAndExchangeRelease(long, long) [ADDED]

  • compareAndExchangeRelease 

    public final long compareAndExchangeRelease(long expectedValue,
                                            long newValue)
    Atomically sets the value to newValue if the current value, referred to as the witness value , == expectedValue , with memory effects as specified by VarHandle.compareAndExchangeRelease(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    the witness value, which will be the same as the expected value if successful
    Since:
    9

method:weakCompareAndSetVolatile(long, long) [ADDED]

  • weakCompareAndSetVolatile 

    public final boolean weakCompareAndSetVolatile(long expectedValue,
                                               long newValue)
    Possibly atomically sets the value to newValue if the current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSet(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    true if successful
    Since:
    9

method:weakCompareAndSetAcquire(long, long) [ADDED]

  • weakCompareAndSetAcquire 

    public final boolean weakCompareAndSetAcquire(long expectedValue,
                                              long newValue)
    Possibly atomically sets the value to newValue if the current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSetAcquire(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    true if successful
    Since:
    9

method:weakCompareAndSetRelease(long, long) [ADDED]

  • weakCompareAndSetRelease 

    public final boolean weakCompareAndSetRelease(long expectedValue,
                                              long newValue)
    Possibly atomically sets the value to newValue if the current value == expectedValue , with memory effects as specified by VarHandle.weakCompareAndSetRelease(java.lang.Object...).
    Parameters:
    expectedValue - the expected value
    newValue - the new value
    Returns:
    true if successful
    Since:
    9

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