Vector<String> vestor =new Vector<String>();
        vestor.add("qq");
        vestor.add("bb");
        vestor.add("ee");

        Iterator iterator = vestor.iterator();
        while (iterator.hasNext()){
            System.out.println(iterator.next());
        }
        System.out.println("-----------");
        for (String s : vestor) {
            System.out.println(s);
        }
        System.out.println("-----------");
        for (int i = 0; i < vestor.size(); i++) {
            System.out.println(vestor.get(i));
        }
        System.out.println("-----------");
        Enumeration<String> enumeration=vestor.elements();
        while (enumeration.hasMoreElements()){
            System.out.println(enumeration.nextElement());
        }

        List<String> list = new ArrayList<String>();
        list.add("ww");
        list.add("vv");
        list.add("bb");
        for (String s :list) {
            System.out.println(s);
        }

        System.out.println("-----------");
        Iterator itor = list.iterator();
        while (itor.hasNext()){
            System.out.println(itor.next());
        }

        System.out.println("-----------");

        for (int i = 0; i < list.size(); i++) {
            System.out.println(list.get(i));
        }

        LinkedList<String> linkedList =new LinkedList<String>();
        linkedList.add("ff");
        linkedList.add("rr");
        linkedList.add("aa");
        for (int i = 0; i < linkedList.size(); i++) {
            System.out.println(linkedList.get(i));
        }

        System.out.println("-----------");

        Iterator iterator = linkedList.iterator();
        while (iterator.hasNext()){
            System.out.println(iterator.next());
        }

        System.out.println("-----------");

        for (int i = 0; i < linkedList.size(); i++) {
            System.out.println(linkedList.get(i));
        }