多选题 Given:
2. import java.util.*;
3. public class HR {
4. public static void main(String[] args) {
5. List＜Integer＞ i = new Vector＜Integer＞();
6. i.add(3); i.add(2); i.add(5);
7. int ref = 1;
8. doStuff (ref);
9. System.out.println(i.get(ref));
10. }
11. static int doStuff(int x) {
12. return ++x;
13. }
What is the result?