need help quick

Hey guys I need some serious help on a program.  I was wondering if anybody could help me convert some code for converting numbers to english text in to some methods that will work in a GUI.  Any help will be greatly appreciated!  Here is my code I have:

class MoneyModel {
 
  private static final String[] mNames = {
    "",
    " Thousand",
    };

  private static final String[] tNames = {
    "",
    " Ten",
    " Twenty",
    " Thirty",
    " Fourty",
    " Fifty",
    " Sixty",
    " Seventy",
    " Eighty",
    " Ninety"
    };

  private static final String[] nNames = {
    "",
    " One",
    " Two",
    " Three",
    " Four",
    " Five",
    " Six",
    " Seven",
    " Eight",
    " Nine",
    " Ten",
    " Eleven",
    " Twelve",
    " Thirteen",
    " Fourteen",
    " Fifteen",
    " Sixteen",
    " Seventeen",
    " Eighteen",
    " Nineteen"
    };

 private String convertLessThanOneThousand(int number) {
    String soFar;

    if (number % 100 < 20){
        soFar = nNames[number % 100];
        number /= 100;
       }
    else {
        soFar = nNames[number % 10];
        number /= 10;

        soFar = tNames[number % 10] + soFar;
        number /= 10;
       }
    if (number == 0) return soFar;
    return nNames[number] + " Hundred" + soFar;
}

public String getMoneyWords(int number) {
    /* special case */
    if (number == 0) { return "zero"; }

    String prefix = "";

    if (number < 0) {
        number = -number;
        prefix = "";
      }

    String soFar = "";
    int place = 0;

    do {
      int n = number % 1000;
      if (n != 0){
         String s = convertLessThanOneThousand(n);
         soFar = s + mNames[place] + soFar;
        }
      place++;
      number /= 1000;
      } while (number > 0);

    return (prefix + soFar).trim();
}

public static void main(String[] args) {
    MoneyModel f = new MoneyModel();
    System.out.println("*** " + f.getCheckWords(0));
    System.out.println("*** " + f.getCheckWords(1));
    System.out.println("*** " + f.getCheckWords(16));
    System.out.println("*** " + f.getCheckWords(100));
    System.out.println("*** " + f.getCheckWords(118));
    System.out.println("*** " + f.getCheckWords(200));
    System.out.println("*** " + f.getCheckWords(219));
    System.out.println("*** " + f.getCheckWords(800));
    System.out.println("*** " + f.getCheckWords(801));
    System.out.println("*** " + f.getCheckWords(999999));
    System.out.println("*** " + f.getCheckWords(-45));
    /*
    *** Zero
    *** One
    *** Sixteen
    *** One hundred
    *** One hundred eighteen
    *** Two hundred
    *** Two hundred nineteen
    *** Eight hundred
    *** Eight hundred one
    *** Nine Hundred Ninety Nine Thousand Nine Hundred Ninety Nine
    *** Fourty Five
    */
}
}


Here is my methods that I need to store information into:

public MoneyModel()  for null constructor, not sure how to do this

public double getMoneyAmount()

public void setMoneyAmount(double)

public String getMoneyWords()   (return value into english text)