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DoubleAccumulator getThenReset() method in Java with Examples

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  • Last Updated : 29 Jan, 2019

The Java.DoubleAccumulator.getThenReset() is an inbuilt method in java that is equivalent in effect to get() followed by reset(). Firstly, it gets the current value and then resets the value. The reset value is zero. The return type is int.

Syntax:

public double getThenReset()

Parameters: The method does not accepts any parameter.

Return Value: The method returns the value before reset.

Below programs illustrate the above method:

Program 1:




// Java program to demonstrate
// the getThenReset() 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(42);
        num.accumulate(10);
  
        num.get();
        // before getThenReset the value is
        System.out.println("Old value is: "
                           + num);
  
        // getThenResets current value
        num.getThenReset();
  
        // Print after getThenReset operation
        System.out.println("Current value is: "
                           + num);
    }
}

Output:

Old value is: 52.0
Current value is: 0.0

Program 2:




// Java program to demonstrate
// the getThenReset() 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(74);
        num.accumulate(1);
  
        num.get();
        // before getThenReset the value is
        System.out.println("Old value is: "
                           + num);
  
        // getThenResets current value
        num.getThenReset();
  
        // Print after getThenReset operation
        System.out.println("Current value is: "
                           + num);
    }
}

Output:

Old value is: 75.0
Current value is: 0.0

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