Solution (leetcode-in-java 1.19 API)

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 Description
  
  Solution()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method 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)