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📜  Java中的 DoubleAccumulator reset() 方法及示例

📅  最后修改于: 2022-05-13 01:55:24.581000             🧑  作者: Mango

Java中的 DoubleAccumulator reset() 方法及示例

Java.DoubleAccumulator.reset()是Java中的一个内置方法,它重置变量以保持对标识值的更新。这意味着它只返回复位值,不带任何参数。返回类型是 int。

句法:

public void reset()

参数:该方法不接受任何参数。

返回值:该方法不返回任何内容。

下面的程序说明了上述方法:

方案一:

// Java program to demonstrate
// the reset() method
  
import java.lang.*;
import java.util.concurrent.atomic.DoubleAccumulator;
  
public class GFG {
    public static void main(String args[])
    {
  
        DoubleAccumulator num
            = new DoubleAccumulator(
                Double::sum, 0L);
  
        // accumulate operation on num
        num.accumulate(2);
        num.accumulate(10);
  
        // Print before doubleValue operation
        System.out.println("DoubleAccumulator before reset: "
                           + num);
  
        // resets current value
        num.reset();
  
        // Print after reset operation
        System.out.println("DoubleAccumulator after reset: "
                           + num);
    }
}
输出:
DoubleAccumulator before reset: 12.0
DoubleAccumulator after reset: 0.0

方案二:

// Java program to demonstrate
// the reset() method
  
import java.lang.*;
import java.util.concurrent.atomic.DoubleAccumulator;
  
public class GFG {
    public static void main(String args[])
    {
  
        DoubleAccumulator num
            = new DoubleAccumulator(
                Double::sum, 0L);
  
        // accumulate operation on num
        num.accumulate(45);
        num.accumulate(17);
  
        // Print before doubleValue operation
        System.out.println("DoubleAccumulator before reset: "
                           + num);
  
        // resets current value
        num.reset();
  
        // Print after reset operation
        System.out.println("DoubleAccumulator after reset: "
                           + num);
    }
}
输出:
DoubleAccumulator before reset: 62.0
DoubleAccumulator after reset: 0.0