【AtomicIntegerArray】常规用法

对应AtomicInteger，AtomicIntegerArray用于操作整型数组

1. 构造

public AtomicIntegerArray(int len): 初始化长度len

public AtomicIntegerArray(int[] array): 根据数组进行初始化

AtomicIntegerArray aia = new AtomicIntegerArray(10);
AtomicIntegerArray aia = new AtomicIntegerArray(new int[]{1,2,3});

2. 指定位置的元素自增1 

AtomicIntegerArray aia = new AtomicIntegerArray(new int[]{1,2,3});
System.out.println(aia.getAndIncrement(0)); // 1，返回旧值
System.out.println(aia.incrementAndGet(1)); // 3，返回新值

3. 指定位置的元素自减1 

AtomicIntegerArray aia = new AtomicIntegerArray(new int[]{1,2,3});
System.out.println(aia.getAndDecrement(0)); // 1，返回旧值
System.out.println(aia.decrementAndGet(1)); // 1, 返回新增

 

4. 如果指定位置的元素是A，则更新成B

boolean compareAndSet(int index, int source, int dest)

AtomicIntegerArray aia = new AtomicIntegerArray(new int[]{1,2,3});
aia.compareAndSet(0, 1, 2);
System.out.println(aia.get(0));

5. 自增N，自减N

AtomicIntegerArray aia = new AtomicIntegerArray(new int[]{1,2,3});
System.out.println(aia.getAndAdd(0, 5)); // 1
System.out.println(aia.addAndGet(0, 5)); // 3

 

6. 硬编码的二元计算逻辑

AtomicIntegerArray aia = new AtomicIntegerArray(new int[]{1,2,3});
System.out.println(aia.getAndUpdate(0, ele -> ele + 5)); // 1
System.out.println(aia.updateAndGet(0, ele -> ele - 3)); // 3

7. 非硬编码的二元运算逻辑 

AtomicIntegerArray aia = new AtomicIntegerArray(new int[]{1,2,3});
System.out.println(aia.getAndAccumulate(0, 5, (a, b) -> a + b)); // 1
System.out.println(aia.accumulateAndGet(0, 3, (a, b) -> a - b)); // 3

8. 直接赋值set()

AtomicIntegerArray aia = new AtomicIntegerArray(new int[]{1,2,3});
aia.set(0, 5);
System.out.println(aia.get(0));

9. 直接取值get() 

10. 取旧值并更新

AtomicIntegerArray aia = new AtomicIntegerArray(new int[]{1,2,3});
System.out.println(aia.getAndSet(0, 5));