Java Programming

HI guys,i've tried to use the program"JFormDesigner" it's a powerful program,but i don't know what i've to do to use its java code, i've tryed to use this code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.jgoodies.forms.factories.*;
import com.jgoodies.forms.layout.*;
/*
* Created by JFormDesigner on Wed Sep 26 10:41:44 CEST 2007
*/



/**
* @author
*/
public class FileReceiver extends JFrame {
public FileReceiver() {
initComponents();
}

public static void main( String args[] )
{
new FileReceiver();

}
private void initComponents() {
// JFormDesigner - Component initialization - DO NOT MODIFY //GEN-BEGIN:initComponents

dialogPane = new JPanel();
contentPanel = new JPanel();
sRicezione = new JLabel();
startButton = new JButton();
label2 = new JLabel();
chooseButton = new JButton();
saveButton = new JButton();
infoButton = new JButton();
buttonBar = new JPanel();
CellConstraints cc = new CellConstraints();

//======== this ========
setTitle("FileReceiver");
setResizable(false);
Container contentPane = getContentPane();
contentPane.setLayout(new BorderLayout());

//======== dialogPane ========
{
dialogPane.setBorder(Borders.DIALOG_BORDER);

// JFormDesigner evaluation mark
dialogPane.setBorder(new javax.swing.border.CompoundBorder(
new javax.swing.border.TitledBorder(new javax.swing.border.EmptyBorder(0, 0, 0, 0),
"JFormDesigner Evaluation", javax.swing.border.TitledBorder.CENTER,
javax.swing.border.TitledBorder.BOTTOM, new java.awt.Font("Dialog", java.awt.Font.BOLD, 12),
java.awt.Color.red), dialogPane.getBorder())); dialogPane.addPropertyChangeListener(new java.beans.PropertyChangeListener(){public void propertyChange(java.beans.PropertyChangeEvent e){if("border".equals(e.getPropertyName()))throw new RuntimeException();}});

dialogPane.setLayout(null);

//======== contentPanel ========
{
contentPanel.setLayout(null);

//---- sRicezione ----
sRicezione.setText("Server in ascolto...");
contentPanel.add(sRicezione);
sRicezione.setBounds(new Rectangle(new Point(0, 6), sRicezione.getPreferredSize()));

//---- startButton ----
startButton.setText("Avvia");
startButton.setToolTipText("Avvia il tuo server");
contentPanel.add(startButton);
startButton.setBounds(308, 0, 117, startButton.getPreferredSize().height);

//---- label2 ----
label2.setText("Desktop\\");
contentPanel.add(label2);
label2.setBounds(0, 35, 238, label2.getPreferredSize().height);

//---- chooseButton ----
chooseButton.setText("Salva in...");
contentPanel.add(chooseButton);
chooseButton.setBounds(308, 29, 116, chooseButton.getPreferredSize().height);

//---- saveButton ----
saveButton.setText("Salva settaggi");
saveButton.setToolTipText("Salva le modifiche apportate");
contentPanel.add(saveButton);
saveButton.setBounds(308, 58, 116, saveButton.getPreferredSize().height);

//---- infoButton ----
infoButton.setText("Informazioni");
infoButton.setToolTipText("Mostra le informazioni riguardo il programma");
infoButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
infoButtonActionPerformed(e);

}
});
contentPanel.add(infoButton);
infoButton.setBounds(308, 92, 116, infoButton.getPreferredSize().height);

{ // compute preferred size
Dimension preferredSize = new Dimension();
for(int i = 0; i < contentPanel.getComponentCount(); i++) {
Rectangle bounds = contentPanel.getComponent(i).getBounds();
preferredSize.width = Math.max(bounds.x + bounds.width, preferredSize.width);
preferredSize.height = Math.max(bounds.y + bounds.height, preferredSize.height);
}
Insets insets = contentPanel.getInsets();
preferredSize.width += insets.right;
preferredSize.height += insets.bottom;
contentPanel.setPreferredSize( preferredSize );
}
}
dialogPane.add(contentPanel);
contentPanel.setBounds(18, 15, 437, contentPanel.getPreferredSize().height);

//======== buttonBar ========
{
buttonBar.setBorder(Borders.BUTTON_BAR_GAP_BORDER);
buttonBar.setLayout(new FormLayout(
new ColumnSpec[] {
FormFactory.GLUE_COLSPEC,
FormFactory.BUTTON_COLSPEC,
FormFactory.RELATED_GAP_COLSPEC,
FormFactory.BUTTON_COLSPEC
},
RowSpec.decodeSpecs("pref")));
}
dialogPane.add(buttonBar);
buttonBar.setBounds(18, 239, 437, buttonBar.getPreferredSize().height);

{ // compute preferred size
Dimension preferredSize = new Dimension();
for(int i = 0; i < dialogPane.getComponentCount(); i++) {
Rectangle bounds = dialogPane.getComponent(i).getBounds();
preferredSize.width = Math.max(bounds.x + bounds.width, preferredSize.width);
preferredSize.height = Math.max(bounds.y + bounds.height, preferredSize.height);
}
Insets insets = dialogPane.getInsets();
preferredSize.width += insets.right;
preferredSize.height += insets.bottom;
dialogPane.setPreferredSize( preferredSize );
}
}
contentPane.add(dialogPane, BorderLayout.CENTER);
// JFormDesigner - End of component initialization //GEN-END:initComponents
}

private void infoButtonActionPerformed(ActionEvent e) {
// TODO add your code here


JOptionPane.showMessageDialog( FileReceiver.this,
"Test dialog","Informazioni",JOptionPane.INFORMATION_MESSAGE );


}

// JFormDesigner - Variables declaration - DO NOT MODIFY //GEN-BEGIN:variables
// Generated using JFormDesigner Evaluation license -
private JPanel dialogPane;
private JPanel contentPanel;
private JLabel sRicezione;
private JButton startButton;
private JLabel label2;
private JButton chooseButton;
private JButton saveButton;
private JButton infoButton;
private JPanel buttonBar;
// JFormDesigner - End of variables declaration //GEN-END:variables
}



But its doesn't work...anyhelps?Thanks!