java.lang.Object
g0301_0400.s0387_first_unique_character_in_a_string.Solution

public class Solution extends Object
387 - First Unique Character in a String\. Easy Given a string `s`, _find the first non-repeating character in it and return its index_. If it does not exist, return `-1`. **Example 1:** **Input:** s = "leetcode" **Output:** 0 **Example 2:** **Input:** s = "loveleetcode" **Output:** 2 **Example 3:** **Input:** s = "aabb" **Output:** -1 **Constraints:** * 1 <= s.length <= 105 * `s` consists of only lowercase English letters.
  • Constructor Details

    • Solution

      public Solution()
  • Method Details

    • firstUniqChar

      public int firstUniqChar(String s)