java.util.concurrent.atomic

Class AtomicLongArray

Contents

    • Method Summary

      Methods 
      Modifier and Type Method and Description
      long addAndGet(int i, long delta)
      Atomically adds the given value to the element at index i.
      boolean compareAndSet(int i, long expect, long update)
      Atomically sets the element at position i to the given updated value if the current value == the expected value.
      long decrementAndGet(int i)
      Atomically decrements by one the element at index i.
      long get(int i)
      Gets the current value at position i.
      long getAndAdd(int i, long delta)
      Atomically adds the given value to the element at index i.
      long getAndDecrement(int i)
      Atomically decrements by one the element at index i.
      long getAndIncrement(int i)
      Atomically increments by one the element at index i.
      long getAndSet(int i, long newValue)
      Atomically sets the element at position i to the given value and returns the old value.
      long incrementAndGet(int i)
      Atomically increments by one the element at index i.
      void lazySet(int i, long newValue)
      Eventually sets the element at position i to the given value.
      int length()
      Returns the length of the array.
      void set(int i, long newValue)
      Sets the element at position i to the given value.
      String toString()
      Returns the String representation of the current values of array.
      boolean weakCompareAndSet(int i, long expect, long update)
      Atomically sets the element at position i to the given updated value if the current value == the expected value.

      AtomicLongArray (Java Platform SE 7 ) Home of API Java Contents Haut

    • Constructor Detail

      • AtomicLongArray

        public AtomicLongArray(int length)
        Creates a new AtomicLongArray of the given length, with all elements initially zero.
        Parameters:
        length - the length of the array

      • AtomicLongArray

        public AtomicLongArray(long[] array)
        Creates a new AtomicLongArray with the same length as, and all elements copied from, the given array.
        Parameters:
        array - the array to copy elements from
        Throws:
        NullPointerException - if array is null

    • Method Detail

      • length

        public final int length()
        Returns the length of the array.
        Returns:
        the length of the array

      • get

        public final long get(int i)
        Gets the current value at position i.
        Parameters:
        i - the index
        Returns:
        the current value

      • set

        public final void set(int i,
       long newValue)
        Sets the element at position i to the given value.
        Parameters:
        i - the index
        newValue - the new value

      • lazySet

        public final void lazySet(int i,
           long newValue)
        Eventually sets the element at position i to the given value.
        Parameters:
        i - the index
        newValue - the new value
        Since:
        1.6

      • getAndSet

        public final long getAndSet(int i,
             long newValue)
        Atomically sets the element at position i to the given value and returns the old value.
        Parameters:
        i - the index
        newValue - the new value
        Returns:
        the previous value

      • compareAndSet

        public final boolean compareAndSet(int i,
                    long expect,
                    long update)
        Atomically sets the element at position i to the given updated value if the current value == the expected value.
        Parameters:
        i - the index
        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.

      • weakCompareAndSet

        public final boolean weakCompareAndSet(int i,
                        long expect,
                        long update)
        Atomically sets the element at position i 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:
        i - the index
        expect - the expected value
        update - the new value
        Returns:
        true if successful.

      • getAndIncrement

        public final long getAndIncrement(int i)
        Atomically increments by one the element at index i.
        Parameters:
        i - the index
        Returns:
        the previous value

      • getAndDecrement

        public final long getAndDecrement(int i)
        Atomically decrements by one the element at index i.
        Parameters:
        i - the index
        Returns:
        the previous value

      • getAndAdd

        public final long getAndAdd(int i,
             long delta)
        Atomically adds the given value to the element at index i.
        Parameters:
        i - the index
        delta - the value to add
        Returns:
        the previous value

      • incrementAndGet

        public final long incrementAndGet(int i)
        Atomically increments by one the element at index i.
        Parameters:
        i - the index
        Returns:
        the updated value

      • decrementAndGet

        public final long decrementAndGet(int i)
        Atomically decrements by one the element at index i.
        Parameters:
        i - the index
        Returns:
        the updated value

      • addAndGet

        public long addAndGet(int i,
             long delta)
        Atomically adds the given value to the element at index i.
        Parameters:
        i - the index
        delta - the value to add
        Returns:
        the updated value

      • toString

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

Document created the 11/06/2005, last modified the 04/03/2020
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