I want to find min in o(1)
and each time min is called min should be deleted

static ArrayList <Integer> numbers = new ArrayList <Integer> ();
        static ArrayList <Integer> min = new ArrayList <Integer> ();


        public static void add(int num){
            numbers.add(num);
            if(min.isEmpty() || num < min.get(min.size()-1))
                min.add(num);

        }

        public static void getMin(){
            if(!min.isEmpty()){
            System.out.println(min.get(min.size() - 1));
            numbers.remove(min.get(min.size() - 1));

            min.remove(min.size() - 1);
            }

but there is problem
add(7)
add(8)
min
min
the output should be
7
8
but it is
7
how do I fix it ?

What exactly is the code supposed to do? What's the list min all about?