PigLatin

public static String pigLatin(String word)
    {
        word = word.toLowerCase();
        int length = word.length();
        int a = word.indexOf("a");
        int e = word.indexOf("e");
        int i = word.indexOf("i");
        int o = word.indexOf("o");
        int u = word.indexOf("u");

        if(a == -1 && e == -1 && i == -1 && o == -1 && u == -1)
            return word + "ay";
        else if(word.charAt(0) == 'a' || word.charAt(0) == 'e' || word.charAt(0) == 'i' || word.charAt(0) == 'o' || word.charAt(0) == 'u')
            return word + "yay";
        else
        {
            int startInt = StringUtil.firstVowel(word);
            String start = word.substring(0, startInt);
            String end = word.substring(startInt, length);
            if(word.substring(0,1) == (word.substring(0,2)).toUpperCase())
                return ((word.substring(0,1)).toUpperCase() + end.substring(1) + start.toLowerCase());
            else

                return end + start;

        }
    }
    public static int firstVowel (String word)
    {
        int length = word.length();
        int a = word.indexOf("a");
        int e = word.indexOf("e");
        int i = word.indexOf("i");
        int o = word.indexOf("o");
        int u = word.indexOf("u");
        int number = 1;
        if(word.charAt(1) == 'a' || word.charAt(1) == 'e' || word.charAt(1) == 'i' || word.charAt(1) == 'o' || word.charAt(1) == 'u')
            return number ;
        else
            return firstVowel(word.substring(1)) + number++;
    }