Java LongAccumulator getThenReset()用法及代碼示例

java.LongAccumulator.getThenReset()是Java中的一種內置方法，等效於get()，然後是reset()。首先，它獲取當前值，然後重置該值。

用法:

public long getThenReset()

參數：此方法不接受任何參數。

返回值：此方法返回複位前的值。

以下示例程序旨在說明上述方法：

程序1：

// Program to demonstrate the getThenReset() method 
  
import java.lang.*; 
import java.util.concurrent.atomic.LongAccumulator; 
  
public class GFG { 
    public static void main(String args[]) 
    { 
        LongAccumulator num = new LongAccumulator(Long::sum, 0L); 
  
        // accumulate operation on num 
        num.accumulate(42); 
        num.accumulate(10); 
  
        num.get(); 
        // before getThenReset the value is 
        System.out.println(" the old value is: " + num); 
        ; 
  
        // getThenResets current value 
        num.getThenReset(); 
  
        // Print after getThenReset operation 
        System.out.println(" the current value is: " + num); 
    } 
}

輸出：

the old value is: 52
 the current value is: 0

程序2：

// Program to demonstrate the getThenReset() method 
  
import java.lang.*; 
import java.util.concurrent.atomic.LongAccumulator; 
  
public class GFG { 
    public static void main(String args[]) 
    { 
        LongAccumulator num = new LongAccumulator(Long::sum, 0L); 
  
        // accumulate operation on num 
        num.accumulate(2); 
        num.accumulate(1); 
  
        num.get(); 
        // before getThenReset the value is 
        System.out.println(" the old value is: " + num); 
          
  
        // getThenResets current value 
        num.getThenReset(); 
  
        // Print after getThenReset operation 
        System.out.println(" the current value is: " + num); 
    } 
}

輸出：

the old value is: 3
the current value is: 0

參考： https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/LongAccumulator.html#getThenReset–

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注：本文由純淨天空篩選整理自Twinkl Bajaj大神的英文原創作品 LongAccumulator getThenReset() method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。