Java DoubleAccumulator reset()方法及示例

Java.DoubleAccumulator.reset() 是java中的一个内置方法，它可以重置变量，保持更新到身份值。这意味着它只返回重置值，不需要任何参数。其返回类型为int。

语法

public void reset()

参数： 该方法不接受任何参数。

返回值： 该方法不返回任何东西。

下面的程序说明了上述方法。

程序1 :

// 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

程序2

// 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