Get Date Suffix in Java

//ww w . jav a  2 s.c  o m
public class Main {
  private static String getDateSuffix(int i) {
    switch (i) {
    case 1:
    case 21:
    case 31:
      return ("st");

    case 2:
    case 22:
      return ("nd");

    case 3:
    case 23:
      return ("rd");

    case 4:
    case 5:
    case 6:
    case 7:
    case 8:
    case 9:
    case 10:
    case 11:
    case 12:
    case 13:
    case 14:
    case 15:
    case 16:
    case 17:
    case 18:
    case 19:
    case 20:
    case 24:
    case 25:
    case 26:
    case 27:
    case 28:
    case 29:
    case 30:
      return ("th");
    default:
      return ("");
    }
  }
  public static void main(String[] argv){
    System.out.println(getDateSuffix(1));
  }
}