222. static·인스턴스·지역 변수와 후위 증가

1class Box {
2    static int shared = 0;
3    int own = 0;
4    void add() {
5        int temp = 0;
6        shared++;
7        own++;
8        temp++;
9        System.out.println(shared + " " + own + " " + temp);
10    }
11}
12public class Main {
13    public static void main(String[] args) {
14        Box a = new Box();
15        Box b = new Box();
16        a.add();
17        b.add();
18        a.add();
19        System.out.println(Box.shared++);
20        System.out.println(Box.shared);
21    }
22}