編寫一個函式，以字串作為輸入，反轉該字串中的母音字母。

示例 1:

輸入: "hello"
輸出: "holle"

示例 2:

輸入: "leetcode"
輸出: "leotcede"

說明:
母音字母不包含字母"y"。

class Solution {
    public String reverseVowels(String s) {
        if(s == ""||s == null) return s;
        int i = 0, j = s.length()-1;
        char []str = s.toCharArray();
        while(i < j){
            while(i < j&&!judgeVowel(str[i]))
                i++;
            while(i < j&&!judgeVowel(str[j]))
                j--;
            if(i < j){
                char temp = str[j];
                str[j] = str[i];
                str[i] = temp;
                i++;
                j--;
            }
        }
        return new String(str);
    }
    public boolean judgeVowel(char c){
        return c == 'a' | c == 'e' | c == 'i' | c == 'o' | c == 'u' |
               c == 'A' | c == 'E' | c == 'I' | c == 'O' | c == 'U';
    }
}