Easy 237题 Delete Node in a Linked List

Question:

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.

Solution:

为什么才过了5.9%？？？

/**
* 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(null==node)
return;
else
{
node.val=node.next.val;
node.next=node.next.next;
}
}
}