Lost Using Swing Components

Hello, I sound like every other newbie but I desperately need help. I have to write an application for the WebBuy Company that allows a user to compose the three parts of a complete email message: the "To", "Subject", and "Message:" text. The "To" and "Subject:" text areas should provide a single line for data entry. The "Message:" area should allow multiple lines of input and be able to scroll if necessary to accommodate a long message. The user clicks a button to send the email message. When the message is complete and the a send button is clicked, the application displays "Mail has been sent!" on a new line in the message area. I then save the files as JEmauil.java. This is what the code is that I have and it shows what I am missing. I would be indebted if someone could help me:

//Insert missing code here. import java.awt.*; import java.awt.event.*;

public class JEMail extends JFrame implements ActionListener { //Insert missing code here. private JTextField toField = new JTextField(24); private JLabel subjectLabel = new JLabel("Subject:"); private JTextField subjectField = new JTextField(24); //Insert missing code here. private JButton sendButton = new JButton("Send"); private JTextArea message = new JTextArea(4, 22);

public JEMail()
{
    super("WebBuy Company E-Mail");
    setSize(370, 270);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container pane = getContentPane();
    FlowLayout flow = new FlowLayout(FlowLayout.RIGHT);
    pane.setLayout(flow);
//Insert missing code here.
    panel1.add(toLabel);
//Insert missing code here.
    pane.add(panel1);
    JPanel panel2 = new JPanel();
    panel2.add(subjectLabel);
    panel2.add(subjectField);
//Insert missing code here.
    JPanel panel3 = new JPanel();
    panel3.add(messageLabel);
    message.setLineWrap(true);
    message.setWrapStyleWord(true);
    JScrollPane scroll = new JScrollPane(message,
       JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
       JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
    panel3.add(scroll);
//Insert missing code here.
    JPanel panel4 = new JPanel();
    panel4.add(sendButton);
    pane.add(panel4);
    sendButton.addActionListener(this);
//Insert missing code here.
}

public static void main(String[] arguments)
{
    JEMail email = new JEMail();
//Insert missing code here.
}
public void actionPerformed(ActionEvent event)
{
  Object source = event.getSource();
  if (source == sendButton)
    message.append("\nMail has been sent!");
}

}