[LeetCode]--345. Reverse Vowels of a String

Write a function that takes a string as input and reverse only the vowels of a string.

Example 1:
Given s = “hello”, return “holle”.

Example 2:
Given s = “leetcode”, return “leotcede”.

Note:
The vowels does not include the letter “y”.

public String reverseVowels(String s) {
        char[] ss = s.toCharArray();
        int j = ss.length - 1, i = 0;
        char temp;
        while (i < j) {