Problem with JApplet painting

I have an applet with some few lightweight(Swing) components on it.
When I run it, the components dose not appear until I pointing on them with the mouse.

Code:

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public class test extends JApplet implements Runnable{
        JButton btn;
        JTextField txt;
        JLabel lbl;
        public void init(){
        this.setSize(300, 300);
        this.setLayout(new FlowLayout(1,0,0));
        btn = new JButton("");
        btn.setPreferredSize(new Dimension(50,10));
        txt = new JTextField("");
        txt.setPreferredSize(new Dimension(50,10));
        lbl = new JLabel("Test");
        lbl.setPreferredSize(new Dimension(50,10));
        add(btn);
        add(txt);
        add(lbl);
       
        }
        public void run(){
               
        }
        public void paint(Graphics g){
               
        }
       
}

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When I delete the paint methode, the components are presenting fine.
What is the problem?

:) sorry for the bad english

Why do you want to have an empty paint method that overrides the class's paint method?

If you want to override it you need to provide code to do what the paint method is supposed to do. If you want to extend what the JApplet's paint() method does, add the following line to your paint method:
super.paint(g);

You should NEVER override the paint() method of a JApplet (or JFrame or JDialog). That is an old AWT trick and should NOT be used with Swing.

@Norm:
The method there just to show the problem
@camickr:
:\ So how do I paint things in SWING without the paint method?

Lesson: Performing Custom Painting (The Java™ Tutorials > Creating a GUI With JFC/Swing)

Thanks I'll read it.
*SOLVED*