public class ArrayExchange {

    public static <T> void swapElements(T[] array, int pos1, int pos2) {
        T temp = array[pos1];
        array[pos1] = array[pos2];
        array[pos2] = temp;
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter number of elements: ");
        int size = scanner.nextInt();
        scanner.nextLine(); // consume newline

        String[] array = new String[size];

        // Get array elements from user
        for (int i = 0; i < size; i++) {
            System.out.print("Enter element " + i + ": ");
            array[i] = scanner.nextLine();
        }

        System.out.println("\nOriginal array: ");
        for (String element : array) {
            System.out.print(element + " ");
        }

        System.out.print("\nEnter first position to swap: ");
        int pos1 = scanner.nextInt();

        System.out.print("Enter second position to swap: ");
        int pos2 = scanner.nextInt();

        swapElements(array, pos1, pos2);

        System.out.println(
            "\nArray after swapping positions " + pos1 + " and " + pos2 + ": "
        );
        for (String element : array) {
            System.out.print(element + " ");
        }

        scanner.close();
    }
}