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

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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) {            while (i < j && !isVowel(ss[i]))                i++;            while (i < j && !isVowel(ss[j]))                j--;            temp = ss[i];            ss[i] = ss[j];            ss[j] = temp;            i++;            j--;        }        return String.valueOf(ss);    }    public boolean isVowel(char c) {        if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u')            return true;        if (c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U')            return true;        return false;    }

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