Integer sum() Method in Java

The java.lang.Integer.sum() is a built-in method in java that returns the sum of its arguments. The method adds two integers together as per the + operator. 

Syntax : 

public static int sum(int a, int b)

Parameter: The method accepts two parameters that are to be added with each other: a : the first integer value. b : the second integer value. 

Return Value: The method returns the sum of its arguments. 

Exception: The method throws an ArithmeticException when the result overflows an int. 

Examples:

Input: a = 170, b = 455
Output: 625

Input: a = 45, b = 45
Output: 90

Below programs illustrate the Java.lang.Integer.sum() method: 

Program 1: For a positive number. 

java

// Java program to illustrate the
// Java.lang.Integer.sum() method
import java.lang.*;

public class Geeks {

    public static void main(String[] args)
    {
        int a = 62;
        int b = 18;
        // It will return the sum of two arguments.
        System.out.println("The sum is ="
                           + Integer.sum(a, b));
    }
}

Output:

The sum is =80

Program 2: Below program illustrates the exception. 

java

// Java program to illustrate the
// Java.lang.Integer.sum() method
import java.lang.*;

public class Geeks {

    public static void main(String[] args)
    {
        // When very large integer is taken
        int a = 92374612162;
        int b = 181;
        // It will return the sum of two arguments.
        System.out.println("The sum is ="
                           + Integer.sum(a, b));
    }
}

Output:

prog.java:8: error: integer number too large: 92374612162
       int a = 92374612162;
               ^
1 error

Program 3 : Find the sum of integers using a loop

Java

import java.io.*;

public class Arrays {
    public static void main(String[] args)
    {
        int[] arr = { 2, 4, 6, 8, 10 };
        int sum = 0;
        for (int i = 0; i < arr.length; i++) {
            sum += arr[i];
        }
        System.out.println("Sum of array elements is: "
                           + sum);
    }
}

Output

Sum of array elements is: 30