反转链表中的java错误

Question

当我们更改指向同一地址的另一个指针时，是否可以更改该指针

反转链表的代码

 Node Reverse(Node node) {
    Node prev = null;
    Node current = node;
    Node next = null;
   Node n = null;
    while (current != null) {
         n = current;
         next = current.next;       //this works
         n.next = prev;
    //  next = current.next;      //this does not
        prev = n;
     current = next;
    }
    node = prev;
    return node;
}

怀疑： 节点n如何影响节点电流。当我写n.next时，电流受到影响，但为什么