[7급 국가직 프로그래밍언어론 2013년 19번]

다음 Java 프로그램에 대한 설명으로 옳지 않은 것은?

import java.util.*;
class Guest {
    private String _name;
    public Guest(String name) { _name = name; }
    public String getName() { return _name; }
}
class GuestList extends Vector<Guest> {
    public GuestList() { super(); }
    public Guest getAt(int index) {
        return super.get(index);
    }
    public void addTail(Guest ptr) { super.add(ptr); }
    public void removeGuest(String name) {
        Guest tmp;
        for (int i = 0; i< this.elementCount; i++) {
            tmp = this.elementAt(i);
            if (name.equals(tmp.getName())) 
                super.removeElementAt(i);
        }
    }
}
public class GuestMan {
    public static void main(String[ ] args) {
        GuestList guests = new GuestList();
        guests.addTail(new Guest("Jennifer"));
        guests.addTail(new Guest("Susan"));
        guests.addTail(new Guest("Mary"));
        guests.removeGuest("Jennifer");
        Iterator<Guest> i = guests.iterator();
        while (i.hasNext())
            System.out.print(i.next().getName() + " ");
    }
}