Java中的 AtomicIntegerArray addAndGet() 方法及示例
Java.util.concurrent.atomic.AtomicIntegerArray.addAndGet()是Java中的一个内置方法,它以原子方式将给定值添加到 AtomicIntegerArray 索引处的元素。该方法将索引值和要添加的值作为参数,并在该索引处返回更新后的值。
句法:
public int addAndGet(int i, int delta)
参数:该函数接受两个参数:
返回值:该函数返回Integer中的更新值。
下面的程序说明了上述方法:
方案一:
// Java program that demonstrates
// the addAndGet() function
import java.util.concurrent.atomic.AtomicIntegerArray;
public class GFG {
public static void main(String args[])
{
// Initializing an array
int a[] = { 10, 22, 33, 44, 55 };
// Initializing an AtomicIntegerArray with array a
AtomicIntegerArray arr = new AtomicIntegerArray(a);
// Displaying the AtomicIntegerArray
System.out.println("The array : " + arr);
// Index where value is to be added
int idx = 0;
// Value to add with value at idx
int x = 16;
// Updating the value at
// idx applying addAndGet
arr.addAndGet(idx, x);
// Displaying the AtomicIntegerArray
System.out.println("The array after update : "
+ arr);
}
}
输出:
The array : [10, 22, 33, 44, 55]
The array after update : [26, 22, 33, 44, 55]
方案二:
// Java program that demonstrates
// the addAndGet() function
import java.util.concurrent.atomic.AtomicIntegerArray;
public class GFG {
public static void main(String args[])
{
// Initializing an array
int a[] = { 1, 2, 3, 4, 5 };
// Initializing an AtomicIntegerArray with array a
AtomicIntegerArray arr = new AtomicIntegerArray(a);
// Displaying the AtomicIntegerArray
System.out.println("The array : " + arr);
// Index where value is to be added
int idx = 3;
// Value to add with value at idx
int x = 16;
// Updating the value at
// idx applying addAndGet
arr.addAndGet(idx, x);
// Displaying the AtomicIntegerArray
System.out.println("The array after update : "
+ arr);
}
}
输出:
The array : [1, 2, 3, 4, 5]
The array after update : [1, 2, 3, 20, 5]
参考: https: Java/util/concurrent/atomic/AtomicIntegerArray.html#addAndGet(int, %20int)