回答问题4，,public Linke

回答问题4，,public Linke

public LinkedList findOrdersForProduct(Product p) {   LinkedList l = new LinkedList();   ArrayList list = getAllOrders();   if (list != null) {      int size = list.size();      for (int i=0; i<size; i++) {         Order order = (Order) list.get(i);         if (order != null && order.getProducts() != null) {            if (order.getProducts().contains(p))               l.add(order);         }      }   }   return l;}}