问题 I have a question for combining two linkedlist. Basically, I want to append one linkedlist to the other linkedlist. Here is my solution. Is there a more efficient way to do it without looping the first linkedlist? Any suggestion would be appreciated. static Node connect(LinkedList list1, LinkedList list2) { Node original = list1.first; Node previous = null; Node current = list1.first; while (current != null) { previous = current; current = current.next; } previous.next = list2.first; return