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 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 and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int	firstUniqChar(String s)

Methods inherited from class java.lang.Object

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

Constructor Detail

Solution

public Solution()

Method Detail

firstUniqChar

public int firstUniqChar(String s)