68-second-largest-element

public Integer secondLargest(List<Integer> numbers) {
    Integer ultimate = -2147483647 - 1;
    Integer penultimate = -2147483647 - 1;

    for (Integer n : numbers)
    {
        if (n > ultimate)
        {
            penultimate = ultimate;
            ultimate = n;
        }
        else if (n < ultimate && n> penultimate)
        {
            penultimate = n;
        }
    }
    return penultimate;
}