import java.util.*;
class Generics13 {
  public static void main(String[] args) {
     List<Integer> list = new LinkedList<Integer>();
     list.add(1);
     list.add(4);
     list.add(-4);
     for(Iterator i = list.iterator(); i.hasNext();) {
            Integer in = i.next();
            System.out.println(in);
     }
  }
}