Determine if string starts with letters A through I

Question

I\'ve got a simple java assignment. I need to determine if a string starts with the letter A through I. I know i have to use string.startsWith(); but I don\'t want to write,

Answer 1

How about this for brevity?

if (0 <= "ABCDEFGHI".indexOf(string.charAt(0))) {
    // string starts with a character between 'A' and 'I' inclusive
}