Update LinkedList.md

Author: Nightingale07

Java相关/LinkedList.md

@@ -28,8 +28,8 @@ List list=Collections.synchronizedList(new LinkedList(...));
 ```java
 privatestaticclassNode<E>{
 E item;//节点值
-Node<E> next;//前驱节点
-Node<E> prev;//后继节点
+Node<E> next;//后继节点
+Node<E> prev;//前驱节点
 
 Node(Node<E>prev, Eelement, Node<E>next){
 this.item = element;