82. ArrayList의 끼워 넣기와 두 가지 remove

1import java.util.ArrayList;
2import java.util.List;
3 
4public class Main {
5    public static void main(String[] args) {
6        List<Integer> list = new ArrayList<>();
7        for (int i = 1; i <= 5; i++) {
8            list.add(i * 2);
9        }
10        list.add(1, 7);
11        list.remove(2);
12        list.remove(Integer.valueOf(8));
13        list.set(0, list.get(3) - list.size());
14        list.remove(Integer.valueOf(6));
15        System.out.println(list);
16        System.out.println(list.indexOf(6) + " " + list.size());
17    }
18}