The java.DoubleAdder.sumThenReset() is an inbuilt method in java is equivalent to sum() then reset() method that is firstly the effective sum is calculated and then the value is reset to maintain the value zero. When the object of the class is created its initial value is zero.
Syntax:
public double sumThenReset()
Parameters: This method does not accepts any parameter.
Return Value: The method returns the sum.
Below programs illustrate the above method:
Program 1:
// Program to demonstrate the sumThenReset() method  import java.lang.*;import java.util.concurrent.atomic.DoubleAdder;  public class GFG {    public static void main(String args[])    {        DoubleAdder num = new DoubleAdder();          // add operation on num        num.add(42);        num.add(10);          // sum operation on num        num.sum();          // Print after sum operation        System.out.println(" the value after sum is: " + num);          // sumThenReset operation on variable num        num.sumThenReset();          // Print after sumThenReset operation        System.out.println("the current value is: " + num);    }} |
Output:
the value after sum is: 52.0 the current value is: 0.0
Program 2:
// Program to demonstrate the sumThenReset() method  import java.lang.*;import java.util.concurrent.atomic.DoubleAdder;  public class GFG {    public static void main(String args[])    {        DoubleAdder num = new DoubleAdder();          // add operation on num        num.add(254);          // sum operation on num        num.sum();          // Print after sum operation        System.out.println(" the value after sum is: " + num);          // sumThenReset operation on variable num        num.sumThenReset();          // Print after sumThenReset operation        System.out.println("the current value is: " + num);    }} |
Output:
the value after sum is: 254.0 the current value is: 0.0
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