Finding the sum of all elements in an array.

Here’s a simple Java program that calculates the sum of all elements in an array:

   public class ArraySum {

    public static void main(String[] args) {

        int[] array = { 1, 2, 3, 4, 5 };

        int sum = calculateSum(array);

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

    }

    public static int calculateSum(int[] array) {

        int sum = 0;

        for (int i = 0; i < array.length; i++) {

            sum += array[i];

        }

        return sum;

    }

}

In this program, we define an array called `array` with some sample elements. The `calculateSum` method iterates through each element of the array, adding it to the `sum` variable. Finally, we print the sum using `System.out.println`.