Java AtomicLongArray get()用法及代码示例

Java.util.concurrent.atomic.AtomicLongArray.get()是Java中的一种内置方法，可在AtomicLongArray的任何位置获取当前值。此方法将索引值作为参数，并返回此索引处的值。

用法:

public final long get(int i)

参数：该函数接受单个参数，即要获取的索引值。

返回值：该函数返回索引i处的当前值。

以下示例程序旨在说明上述方法：

示例1:

// Java program that demonstrates 
// the get() 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 to get 
        int idx = 2; 
  
        // Using get() to retrieve value at idx 
        long val = arr.get(idx); 
  
        // Displaying the value at idx 
        System.out.println("Value at index " + idx 
                           + " is " + val); 
    } 
}

输出：

The array : [1, 2, 3, 4, 5]
Value at index 2 is 3

示例2:

// Java program that demonstrates 
// the get() function 
  
import java.util.concurrent.atomic.AtomicLongArray; 
  
public class GFG { 
    public static void main(String args[]) 
    { 
        // Initializing an array 
        long a[] = { 12, 22, 23, 24, 25 }; 
  
        // Initializing an AtomicLongArray with array a 
        AtomicLongArray arr = new AtomicLongArray(a); 
  
        // Displaying the AtomicLongArray 
        System.out.println("The array : " + arr); 
  
        // Index to get 
        int idx = 4; 
  
        // Using get() to retrieve value at idx 
        long val = arr.get(idx); 
  
        // Displaying the value at idx 
        System.out.println("Value at index " + idx 
                           + " is " + val); 
    } 
}

输出：

The array : [12, 22, 23, 24, 25]
Value at index 4 is 25

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

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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 get() 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。