//find min
int smallest = listInt.get(0);
int number = 0;

for (int i = 0; i < listInt.size(); i++) {

    number = listInt.get(i);

    if (number < smallest) {
        smallest = number;
    }

}

System.out.println(smallest);




//find max
int bigest = listInt.get(0);
int number = 0;

for (int i = 0; i < listInt.size(); i++) {

    number = listInt.get(i);

    if (number > bigest) {
        bigest = number;
    }

}

System.out.println(bigest);