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LongAccumulator doubleValue() method in Java with Examples
  • Last Updated : 28 Jan, 2019

The java.LongAccumulator.doubleValue() is an inbuilt method in java that returns the current value as a double after a widening primitive conversion.

Syntax:

public double doubleValue()

Parameters: This method does not accepts any parameter.

Return Value: This method returns the current value as a double after a widening primitive conversion.

Below programs illustrate the above method:



Program 1:




// Program to demonstrate the doubleValue() method
  
import java.lang.*;
import java.util.concurrent.atomic.LongAccumulator;
  
public class GFG {
    public static void main(String args[])
    {
        LongAccumulator num = new LongAccumulator(Long::sum, 0L);
  
        // accumulate operation on num
        num.accumulate(42);
        num.accumulate(10);
  
        // Print before doubleValue operation
        System.out.println(" the old value is: " + num);
  
        // doubleValues current value
        num.doubleValue();
  
        // Print after doubleValue operation
        System.out.println("the current value is: " + num);
    }
}
Output:
the old value is: 52
the current value is: 52

Program 2:




// Program to demonstrate the doubleValue() method
  
import java.lang.*;
import java.util.concurrent.atomic.LongAccumulator;
  
public class GFG {
    public static void main(String args[])
    {
        LongAccumulator num = new LongAccumulator(Long::sum, 0L);
  
        // accumulate operation on num
        num.accumulate(4);
        num.accumulate(10);
  
        // Print before doubleValue operation
        System.out.println(" the old value is: " + num);
  
        // doubleValues current value
        num.doubleValue();
  
        // Print after doubleValue operation
        System.out.println("the current value is: " + num);
    }
}
Output:
the old value is: 14
the current value is: 14

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

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