LeetCode OJ 237Delete Node in a Linked List

Posted xujian_2014

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题目链接:https://leetcode.com/problems/delete-node-in-a-linked-list/

题目: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.

解题思路:删除单链表中指定的节点,一般有两种方法:第一种是遍历得到指定节点的前一个节点,将该节点的next执行指定节点的下一个节点,然后删除指定节点,第二个方法是将指定节点下一个节点的data值赋给指定节点,然后将指定节点的next指向该节点的下下一个节点即可。本题显然可以使用第二种方法来解决。

示例代码:

public class Solution

	class ListNode
	
		int val;
		ListNode next;
		ListNode(int x)
		
			val = x;
		
	
	public void deleteNode(ListNode node)
	
		if(node==null)
			return ;
		node.val=node.next.val;
		node.next=node.next.next;	
	


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