java.util.concurrent.atomic

Class AtomicIntegerArray

Table des matières

    • Constructor Summary

      Constructors 
      Constructor and Description
      AtomicIntegerArray(int length)
      Creates a new AtomicIntegerArray of the given length, with all elements initially zero.
      AtomicIntegerArray(int[] array)
      Creates a new AtomicIntegerArray with the same length as, and all elements copied from, the given array.

        

    • Method Summary

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

        

    • Constructor Detail

      • AtomicIntegerArray

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

      • AtomicIntegerArray

        public AtomicIntegerArray(int[] array)
        Creates a new AtomicIntegerArray 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 int 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,
       int 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,
           int 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 int getAndSet(int i,
            int 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,
                    int expect,
                    int 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,
                        int expect,
                        int 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 int getAndIncrement(int i)
        Atomically increments by one the element at index i.
        Parameters:
        i - the index
        Returns:
        the previous value

      • getAndDecrement

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

      • getAndAdd

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

      • decrementAndGet

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

      • addAndGet

        public final int addAndGet(int i,
            int 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

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Document créé le 06/12/2006, dernière modification le 04/03/2020
Source du document imprimé : https://www.gaudry.be/java-api-rf-java/util/concurrent/atomic/AtomicIntegerArray.html

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Références

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