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DoubleAdder sum() method in Java with Examples

  • Last Updated : 28 Jan, 2019

The java.DoubleAdder.sum() is an inbuilt method in java that returns the current sum. When the object of the class is created its initial value is zero.

Syntax:

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public double sum()

Parameters: This method does not accepts any parameter.

Return Value: This method returns the current sum.



Below programs illustrate the above method:

Program 1:




// Program to demonstrate the sum() 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 variable num
        num.sum();
  
        // Print after add operation
        System.out.println(" the current value is: " + num);
    }
}
Output:
the current value is: 52.0

Program 2:




// Program to demonstrate the sum() 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(10);
  
        // sum operation on variable num
        num.sum();
  
        // Print after add operation
        System.out.println(" the current value is: " + num);
    }
}
Output:
the current value is: 10.0

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/DoubleAdder.html#sum–




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