多选题 Given:
2. public class Toolbox {
3. static Toolbox st;
4. public static void main(String[] args) {
5. new Toolbox().go();
6. // what"s eligible?
7. }
8. void go() {
9. MyInner in = new MyInner();
10. Integer i3 = in.doInner();
11. Toolbox t = new Toolbox();
12. st = t;
13. System.out.println(i3);
14. }
15. class MyInner {
16. public Integer doInner() {return new Integer(34);
17. }
18. }
When the code reaches line 6, which are eligible for garbage collection? (Choose all that apply.)