Package g0301_0400.s0387_first_unique_character_in_a_string

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    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:

    • <code>1 <= s.length <= 10<sup>5</sup></code>

    • s consists of only lowercase English letters.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer firstUniqChar(String s)

      • Methods inherited from class java.lang.Object

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