LeetCode_字符串_简单_387. 字符串中的第一个唯一字符

星许辰发布时间：2022-06-21 09:34:36 ，浏览量：0

1.题目
2.思路
3.代码实现（Java）

1.题目

给定一个字符串 s ，找到它的第一个不重复的字符，并返回它的索引。如果不存在，则返回 -1 。

示例 1：输入: s = “leetcode” 输出: 0

示例 2：输入: s = “loveleetcode” 输出: 2

示例 3：输入: s = “aabb” 输出: -1

提示： 1

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LeetCode_字符串_简单_387. 字符串中的第一个唯一字符

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