Terbilang Di java

uih hati seneng deh belajar terbilang berhasil, ya pertama tama ya mangkel coz bikin gak jadi akhirnya minta bantuan paman googale akhirnya ketemu dengan bognya om Ng Elyi Junaidi.koding untuk konversi angka ke karakter ya dengan koding sebagai berikut :
**
* @(#)Text4.java
*
*
* @author
* @version 1.00 2008/12/4
*/

import javax.swing.SwingUtilities;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.Rectangle;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JTextArea;

public class TerbilangJava extends JFrame {

private static final long serialVersionUID = 1L;
private JPanel jContentPane = null;
private JLabel jLabel = null;
private JTextField txtBilangan = null;
private JButton btnTerbilang = null;
private JTextArea jTextArea = null;
private StringBuffer sb = new StringBuffer();
// @jve:decl-index=0:
String bilangan[] = new String[] { "", "Satu ", "Dua ", "Tiga ", "Empat ",
"Lima ", "Enam ", "Tujuh ", "Delapan ", "Sembilan ", "Sepuluh ",
"Sebelas " };
private JButton jButton = null;

/**
* This method initializes txtBilangan
*
* @return javax.swing.JTextField
*/
private JTextField getTxtBilangan() {
if (txtBilangan == null) {
txtBilangan = new JTextField();
txtBilangan.setBounds(new Rectangle(135, 15, 166, 31));
}
return txtBilangan;
}

/**
* This method initializes btnTerbilang
*
* @return javax.swing.JButton
*/
private JButton getBtnTerbilang() {
if (btnTerbilang == null) {
btnTerbilang = new JButton();
btnTerbilang.setBounds(new Rectangle(315, 15, 152, 31));
btnTerbilang.setText("Terbilang");
btnTerbilang.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
jTextArea.setText("");
String hasil = generate((double)Integer.parseInt(txtBilangan.getText()));
jTextArea.append(Integer.parseInt(txtBilangan.getText())+" = "+hasil);
txtBilangan.setText("");
sb.delete(0, 1000);
}
});
}
return btnTerbilang;
}

/**
* This method initializes jTextArea
*
* @return javax.swing.JTextArea
*/
private JTextArea getJTextArea() {
if (jTextArea == null) {
jTextArea = new JTextArea();
jTextArea.setBounds(new Rectangle(30, 60, 800, 91));
}
return jTextArea;
}

/**
* This method initializes jButton
*
* @return javax.swing.JButton
*/
private JButton getJButton() {
if (jButton == null) {
jButton = new JButton();
jButton.setBounds(new Rectangle(510, 15, 121, 31));
jButton.setText("About");
jButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
System.out.println("actionPerformed()"); // TODO Auto-generated Event stub actionPerformed()
JOptionPane.showMessageDialog(null, "Ng Elyi Junaidi (ng_elyi@yahoo.co.id) (ngelyi.wordpress.com)");
}
});
}
return jButton;
}

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
SwingUtilities.invokeLater(new Runnable() {
public void run() {
TerbilangJava thisClass = new TerbilangJava();
thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
thisClass.setVisible(true);
}
});
}

/**
* This is the default constructor
*/
public TerbilangJava() {

super();
initialize();
}

/**
* This method initializes this
*
* @return void
*/
private void initialize() {
this.setSize(900, 207);
this.setContentPane(getJContentPane());
this.setTitle("JFrame");
}

/**
* This method initializes jContentPane
*
* @return javax.swing.JPanel
*/
private JPanel getJContentPane() {
if (jContentPane == null) {
jLabel = new JLabel();
jLabel.setBounds(new Rectangle(15, 15, 106, 31));
jLabel.setText("Bilangan");
jContentPane = new JPanel();
jContentPane.setLayout(null);
jContentPane.add(jLabel, null);
jContentPane.add(getTxtBilangan(), null);
jContentPane.add(getBtnTerbilang(), null);
jContentPane.add(getJTextArea(), null);
jContentPane.add(getJButton(), null);
}
return jContentPane;
}

public String generate(double number) {

// logger.debug(”num {}”, number);

if (number < 12) {
sb.append(bilangan[(int)number]);
}

if (number >= 12 && number < 20) {
generate( number - 10);
sb.append("belas ");
}

if(number >= 20 && number < 100){
generate(number/10);
sb.append("puluh ");
generate(number % 10);
}

if (number >= 100 && number < 200) {
sb.append("seratus ");
generate( number % 100 );
}

if (number >= 200 && number < 1000){
generate(number / 100);
sb.append("ratus ");
generate( number % 100 );
}

if (number >= 1000 && number < 2000){
sb.append("seribu ");
generate( number % 1000 );
}

if(number >= 2000 && number < 1000000){
generate(number/1000);
sb.append("ribu ");
generate( number % 1000);
}

if (number >= 1000000 && number < 1000000000){
generate(number/1000000);
sb.append("juta ");
generate( number % 1000000 );
}

return sb.toString();
}

}