Package g0301_0400.s0387_first_unique_character_in_a_string

Class Solution

java.lang.Object
g0301_0400.s0387_first_unique_character_in_a_string.Solution
public class Solution extends java.lang.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 Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    firstUniqChar(java.lang.String s)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • firstUniqChar

      public int firstUniqChar(java.lang.String s)