What's the best way to check if a character is a vowel in Java?

Question

I'm trying to check if a certain char is a vowel. What's the best way to go about doing this?

Answer 1

Here's the solution I've been using for a while, and it hasn't let me down yet:

private static String VOWELS = "AÀÁÂÃÄÅĀĂĄǺȀȂẠẢẤẦẨẪẬẮẰẲẴẶḀÆǼEȄȆḔḖḘḚḜẸẺẼẾỀỂỄỆĒĔĖĘĚÈÉÊËIȈȊḬḮỈỊĨĪĬĮİÌÍÎÏIJOŒØǾȌȎṌṎṐṒỌỎỐỒỔỖỘỚỜỞỠỢŌÒÓŎŐÔÕÖUŨŪŬŮŰŲÙÚÛÜȔȖṲṴṶṸṺỤỦỨỪỬỮỰYẙỲỴỶỸŶŸÝ";
private static boolean isVowel(char c)
{
    return VOWELS.indexOf(Character.toUpperCase(c)) >= 0;
}

For my applications, it's reasonably fast.