Home assignment

import java.util.List;

class HelloWorld {
    public static void main(String[] args) {
        List<Integer> arr = List.of(-15, 7, 0, 88, 33, 15);
        System.out.println(getSecondLargestInteger(arr));
    }

    public static Integer getSecondLargestInteger(List<Integer> arr) {
        if (arr == null || arr.size() < 2) {
            throw new IllegalArgumentException("Array must contain at least 2 values");
        }

        int largest = arr.get(0);
        int secondLargest = Integer.MIN_VALUE;

        for (int current : arr) {
            if (current > largest) {
                secondLargest = largest;
                largest = current;
            } else if (current > secondLargest && current != largest) {
                secondLargest = current;
            }
        }

        return secondLargest == Integer.MIN_VALUE ? null : secondLargest;
    }
}