Java Double sum() Method

The Double.sum() method in Java is used to add two double values together.

Table of Contents

1. Introduction
2. sum() Method Syntax
3. Examples
   • Adding Two Positive Values
   • Adding a Positive and a Negative Value
   • Adding Special Values (Infinity and NaN)
4. Real-World Use Case
5. Conclusion

Introduction

The Double.sum() method is a static method in the Double class in Java. It adds two double values together and returns their sum. This method is useful for performing arithmetic operations in a concise and readable manner.

sum()() Method Syntax

The syntax for the Double.sum() method is as follows:

public static double sum(double a, double b)

• a: The first double value to be added.
• b: The second double value to be added.

The method returns:

• The sum of the two double values.

Examples

Adding Two Positive Values

The sum() method can be used to add two positive double values.

Example

public class SumExample {
    public static void main(String[] args) {
        double a = 5.67;
        double b = 8.34;

        double result = Double.sum(a, b);

        System.out.println("The sum of 5.67 and 8.34 is: " + result);
    }
}

Output:

The sum of 5.67 and 8.34 is: 14.01

In this example, the method adds the values 5.67 and 8.34, resulting in 14.01.

Adding a Positive and a Negative Value

The sum() method can also be used to add a positive double value and a negative double value.

Example

public class SumPositiveNegativeExample {
    public static void main(String[] args) {
        double a = 10.5;
        double b = -3.2;

        double result = Double.sum(a, b);

        System.out.println("The sum of 10.5 and -3.2 is: " + result);
    }
}

Output:

The sum of 10.5 and -3.2 is: 7.3

In this example, the method adds the values 10.5 and -3.2, resulting in 7.3.

Adding Special Values (Infinity and NaN)

The sum() method handles special values such as positive infinity, negative infinity, and NaN (Not-a-Number).

Example

public class SpecialValuesExample {
    public static void main(String[] args) {
        double a = Double.POSITIVE_INFINITY;
        double b = 10.0;
        double c = Double.NaN;

        System.out.println("The sum of POSITIVE_INFINITY and 10.0 is: " + Double.sum(a, b));
        System.out.println("The sum of NaN and 10.0 is: " + Double.sum(c, b));
    }
}

Output:

The sum of POSITIVE_INFINITY and 10.0 is: Infinity
The sum of NaN and 10.0 is: NaN

In this example, the method correctly handles the special values POSITIVE_INFINITY and NaN.

Real-World Use Case

Summing Values in an Array

In a real-world application, you might need to sum the values in an array of double values.

Example

public class ArraySumExample {
    public static void main(String[] args) {
        double[] values = {1.1, 2.2, 3.3, 4.4, 5.5};

        double sum = 0;
        for (double value : values) {
            sum = Double.sum(sum, value);
        }

        System.out.println("The sum of the array values is: " + sum);
    }
}

Output:

The sum of the array values is: 16.5

In this example, the code iterates through an array of double values and sums them using the Double.sum() method.

Conclusion

The Double.sum() method in Java is a simple and effective way to add two double values together. By understanding how to use this method, you can efficiently handle tasks that involve arithmetic operations on double values in your Java applications. Whether you are adding positive values, handling special cases, or summing values in an array, the sum() method provides a reliable solution for these tasks.