import java.util.ArrayList;

public class arraylist {

public static void main(String[] args) {

ArrayList<Integer> list = new ArrayList<>();

list.add(12);

list.add(127);

list.add(19992);

list.add(126);

list.add(1432);

list.add(142);

System.out.println(list);

list.remove(0);

list.add(0, 99);

list.clear();

//after removing the first element and adding 99 at the first index

System.out.println(list);

}

}