static double loopChain() 
{
    long before = System.currentTimeMillis();
    Chain c;
    for(int i = 0; i <  RUN_LENGTH; i++) {
      c = head;
      while(c != null) {
	tmp = c.s;
	c = c.next;
      }
    }
    return (System.currentTimeMillis() - before)*1000.0/RUN_LENGTH;
}

 static double loopVector() 
{
    long before = System.currentTimeMillis();
    int size = v.size();
    for(int i = 0; i <  RUN_LENGTH; i++) {
      for(int j = 0; j <  size; j++)
	tmp = (String) v.elementAt(j);
    }
    return (System.currentTimeMillis() - before)*1000.0/RUN_LENGTH;
}

 public static  void main(String[] args) 
{
  
    v.addElement("aaa");
    v.addElement("bbb");
    v.addElement("ccc");
    v.addElement("ddd");
    v.addElement("eee");
    Chain c = new Chain("aaa");
    head = c;
    c.next = new Chain("bbb"); c = c.next;
    c.next = new Chain("ccc"); c = c.next;
    c.next = new Chain("ddd"); c = c.next;
    c.next = new Chain("eee");
    double t;
    t = loopChain();
    System.out.println("Looping thourgh the chain took " + t);
    t = loopVector();
    System.out.println("Looping thourgh the vector took " + t);
}