题目要求

Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.
Supposed the linked list is 1 -> 2 -> 3 -> 4and you are given the third node with value 3, the linked list should become 1 -> 2 -> 4 after calling your function.

题目解读：

他给出的node本来就是一个单向链表，要删除的节点也是这个节点

代码

/**
 * Definition for singly-linked list.
 * public class ListNode {
 *     int val;
 *     ListNode next;
 *     ListNode(int x) { val = x; }
 * }
 */
public class Solution {
    public void deleteNode(ListNode node) {
        if(node == null)
        return ;
        node.val = node.next.val;
        node.next = node.next.next;
        
    }
}