I can not see any of my component why ?
Here is all the code, I forget something but I do not remember what

Code:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;

public class mainInterface extends JApplet {
  JFrame frame = new JFrame();
  JLabel lbl_titre = new JLabel();
  JLabel lbl_prenom = new JLabel();
  JLabel lbl_nom = new JLabel();
  JLabel lbl_pays = new JLabel();
  JLabel lbl_adresse = new JLabel();
  JLabel lbl_numero = new JLabel();

  //Initialize the applet
  public void init() {}
  public mainInterface()
  {
    JApplet applet = new mainInterface();
    frame.setTitle("Applet Frame");
    frame.setContentPane(applet.getContentPane());
    frame.setLayout (null);
    //applet.init(); applet.start();
    frame.setSize(400,320);
    initComponent();
    frame.setVisible(true);
  } //End constructor : mainInterface

  //Main method
  public static void main(String args[])
  {
    mainInterface goGo = new mainInterface();
  }//End Main

  public void initComponent()
  {
    //Ajout du texte
    lbl_titre.setText ("Donation Internationale");
    lbl_prenom.setText ("Prenom:");
    lbl_nom.setText ("Nom:");
    lbl_pays.setText ("Pays:");
    lbl_adresse.setText ("Adresse:");
    lbl_numero.setText ("Numero de carte de crédit:");

    //Positionnement
    lbl_titre.setBounds   (10,10,200,25);
    lbl_prenom.setBounds  (10,35,40,25);
    lbl_nom.setBounds     (10,60,40,25);
    lbl_pays.setBounds    (10,85,40,25);
    lbl_adresse.setBounds (10,110,40,25);
    lbl_numero.setBounds  (10,135,40,25);

    //Ajout dans le frame
    frame.add (lbl_titre);
    frame.add (lbl_prenom);
    frame.add (lbl_nom);
    frame.add (lbl_pays);
    frame.add (lbl_adresse);
    frame.add (lbl_numero);

  }//End initComponent

}//End class : mainInterface