Ejemplo

O(2)

public class Main {
    public void log(int[] numbers) {
        // O(1)
        System.out.println(numbers[0]);
    }
}

O(2)

public class Main {
    public void log(int[] numbers) {
        // O(2)
        System.out.println(numbers[0]);
        System.out.println(numbers[0]);
    }
}