Integer to Alphabet Conversion

IntToAlphabet.java

public class IntToAlphabet {
  public static String toAlphabetic(int i) {
    if (i < 0) {
      return "-" + toAlphabetic(-i - 1);
    }
    
    int quot = i / 26;
    int rem = i % 26;
    char letter = (char) ((int) 'A' + rem);
    if (quot == 0) {
      return "" + letter;
    } else {
      return toAlphabetic(quot - 1) + letter;
    }
  }
}