static void bubbleSort(Poker[] pokers){
        int len = pokers.length;
        for (int i = 0; i < len ;i++){
            for (int j = i; j < len-1; j++){
                if (pokers[j] != null && pokers[j+1] != null && pokers[j].compareTo(pokers[j+1]) == 1){
                    Poker temp = pokers[j];
                    pokers[j] = pokers[j+1];
                    pokers[j+1] = temp;
                }
            }
        }
    }