DoubleAccumulator longValue() method in Java with Examples

The Java.DoubleAccumulator.longValue() is an inbuilt method in java that returns the current value as a long after a narrowing primitive conversion. It means the initial datatype is double which is explicitly converted into type long.

Syntax:

public long longValue()

Parameters: The method does not accepts any parameter.

Return value: The method returns the current value as a long after a narrowing primitive conversion.

PBelow programs illustrate the above method:

Program 1:

// Java program to demonstrate the
// longValue() 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);

        // Print before longValue operation
        System.out.println("Old value is: "
                           + num);

        // Print after longValue operation
        System.out.println("Current long value is: "
                           + num.floatValue());
    }
}

Output:

Old value is: 52.0
Current long value is: 52.0

Program 2:

// Java program to demonstrate the
// longValue() 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(26);
        num.accumulate(45);

        // Print before longValue operation
        System.out.println("Old value is: "
                           + num);

        // Print after longValue operation
        System.out.println("Current long value is: "
                           + num.floatValue());
    }
}

Output:

Old value is: 71.0
Current long value is: 71.0