import java.awt.*;

public class util_listes extends java.applet.Applet
{
  Panel p;
  TextField tf;
  liste l;
  Button supprime;

  public void init()
  {
    int i;

    l = new liste();

    setLayout(new BorderLayout());

    p = new Panel();
    add("North",p);
    p.setLayout(new GridLayout(3,3));
    for (i = 1;i <= 9;i ++)
      p.add(new Button(String.valueOf(i)));

    supprime = new Button ("Supprimer");
    add("Center",supprime);

    tf = new TextField(20);
    tf.setEditable(false);
    add("South",tf);
  }

  public boolean action(Event e, Object arg)
  {
    try
    {
      if (e.target == supprime)
      {
        if (!l.est_vide())
          l = l.fin();
      }
      else
        l = new liste(new Integer(arg.toString()).intValue(),l);

      tf.setText(l.toString());
    }
    catch (Exception exc) {}

    return (true);  
  }
}