public class StringMain {

        public static void main(String[] args) {

            int i = 0;
            char letter;
            int result = 0;
            String str = "12345";

            str = new StringBuilder(str).reverse().toString();

            char[] c = str.toCharArray();

            while (i < str.length()) {

                letter = c[i];
                result = (int) letter;
                i++;

                switch (result) {

                case 49:
                    System.out.print(" Eins");
                    break;
                case 50:
                    System.out.print(" Zwei");
                    break;
                case 51:
                    System.out.print(" Drei");
                    break;
                case 52:
                    System.out.print(" Vier");
                    break;
                case 53:
                    System.out.print(" Fünf");
                    break;
                case 54:
                    System.out.print(" Sechs");
                    break;
                case 55:
                    System.out.print(" Sieben");
                    break;
                case 56:
                    System.out.print(" Acht");
                    break;
                case 57:
                    System.out.print(" Neun");
                    break;
                default:
                    System.out.print(" Null");
                    break;
                }

            }

        }

    }