public class NumberToWords {

    public static void numberToWords(int number) {
        if(number < 0) {
            System.out.println("Invalid Value");
        } else {

            int rev = reverse(number);
            int count = getDigitCount(number);
            for(int i = count; i > 0; count--) {
                int lastDigit = rev % 2;
                switch(lastDigit) {
                    case 0:
                        System.out.println("Zero");
                        break;

                    case 1:
                        System.out.println("One");
                        break;

                    case 2:
                        System.out.println("Two");
                        break;

                    case 3:
                        System.out.println("Three");
                        break;

                    case 4:
                        System.out.println("Four");
                        break;

                    case 5:
                        System.out.println("Five");
                        break;

                    case 6:
                        System.out.println("Six");
                        break;

                    case 7:
                        System.out.println("Seven");
                        break;

                    case 8:
                        System.out.println("Eight");
                        break;

                    case 9:
                        System.out.println("Nine");
                        break;
                }
                rev /= 10;
            }
        }
    }

    public static int reverse(int value) {
        int rev_num = 0;
        while(value != 0) {
            rev_num = rev_num * 10 + value % 10;
            value = value / 10;
        }
        return rev_num;
    }

    public static int getDigitCount(int number) {
        int count = 0;
        while(number > 0) {
            number = number % 10;
            count++;
            number /= 10;
        }
        return count;
    }

}