多选题 Given:
3. public class Fiji {
4. static Fiji base;
5. Fiji f;
6. public static void main(String[] args) {
7. new Fiji() .go();
8. // do more stuff
9. }
10. void go() {
11. Fiji f1 = new Fiji();
12. base = f1;
13. Fiji f2 = new Fiji();
14. f1.f = f2;
15. Fiji f3 = f1.f;
16. f2.f = f1;
17. base = null; f1 = null; f2 = null;
18. // do stuff
19. } }
Which are true? (Choose all that apply.)