237. Delete Node in a Linked List

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 -> 4 and you are given the third node with value 3, the linked list should become 1 -> 2 -> 4 after calling your function.

读题

题目的意思很简单，就是给一个节点，然后将这个节点在链表中删除

思路

因为没有给出这个节点的前置节点，所以就需要换一个思路，将这个节点的值与后边节点的值进行交换，然后这个节点的next指向其后置节点的next

题解

/**
 * 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) {
        int temp = node.next.val;
        node.next.val = node.val;
        node.val = temp;
        node.next = node.next.next;
    }
}