Java AtomicLongArray lazySet()用法及代码示例

Java.util.concurrent.atomic.AtomicLongArray.lazySet()是Java中的一种内置方法，最终会在AtomicLongArray的任何给定索引处设置给定值。该方法采用AtomicLongArray的索引值和要设置为参数的值，并在不返回任何值的情况下更新前一个值。

用法:

public final void lazySet(int i, long newValue)

参数：该函数有两个参数：

i这是进行更新的索引值。
newValue这是要在索引处更新的新值。

返回值：该函数不返回任何值。

以下示例程序旨在说明上述方法：

示例1:

// Java program that demonstrates 
// the lazySet() function 
  
import java.util.concurrent.atomic.AtomicLongArray; 
  
public class GFG { 
    public static void main(String args[]) 
    { 
        // Initializing an array 
        long a[] = { 1, 2, 3, 4, 5 }; 
  
        // Initializing an AtomicLongArray 
        // with array a 
        AtomicLongArray arr 
            = new AtomicLongArray(a); 
  
        // Displaying the AtomicLongArray 
        System.out.println("The array : " + arr); 
  
        // Index where operation is performed 
        int idx = 0; 
  
        // The new value to update at idx 
        long val = 10; 
  
        // Updating the value at 
        // idx applying lazySet 
        arr.lazySet(idx, val); 
  
        // Displaying the AtomicLongArray 
        System.out.println("The array after"
                           + " update : "
                           + arr); 
    } 
}

输出：

The array : [1, 2, 3, 4, 5]
The array after update : [10, 2, 3, 4, 5]

示例2:

// Java program that demonstrates 
// the lazySet() function 
  
import java.util.concurrent.atomic.AtomicLongArray; 
  
public class GFG { 
    public static void main(String args[]) 
    { 
        // Initializing an array 
        long a[] = { 1, 2, 3, 4, 5 }; 
  
        // Initializing an AtomicLongArray 
        // with array a 
        AtomicLongArray arr 
            = new AtomicLongArray(a); 
  
        // Displaying the AtomicLongArray 
        System.out.println("The array : " + arr); 
  
        // Index where operation is performed 
        int idx = 3; 
  
        // The new value to update at idx 
        long val = 100; 
  
        // Updating the value at 
        // idx applying lazySet 
        arr.lazySet(idx, val); 
  
        // Displaying the AtomicLongArray 
        System.out.println("The array after "
                           + "update : "
                           + arr); 
    } 
}

输出：

The array : [1, 2, 3, 4, 5]
The array after update : [1, 2, 3, 100, 5]

参考： https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicLongArray.html#lazySet-int-long-

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注：本文由纯净天空筛选整理自rupesh_rao大神的英文原创作品 AtomicLongArray lazySet() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。