Who knows why a JPanel is automatically painted twice? Please look at my co

Question

// "Raw Problem": Start this as Application or in Appletviewer
// <applet code= ZaehlePaintAufrufe width=400 height=250>
// </applet>
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Zeichnung extends JPanel
private int calls = 0;
public void paintComponent(Graphics g)
super.paintComponent(g);
calls++;
int breite = getWidth();
int hoehe = getHeight();
g.drawString("Width: " + breite + " Height: " + hoehe + " Resize Me!", breite/4, hoehe/2);
g.drawString("Paint-Calls: " + calls, breite/4, hoehe/2+30);
public class ZaehlePaintAufrufe extends JApplet
Zeichnung z = new Zeichnung();
public void init()
Container cp = getContentPane();
cp.add(z);
public static void main(String[] args)
JApplet applet = new ZaehlePaintAufrufe();
JFrame frame = new JFrame("ZaehlePaintAufrufe");
frame.addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent e) {  System.exit(0);  } } );
frame.getContentPane().add(applet);
frame.setSize(400,250);
applet.init();
applet.start();
frame.setVisible(true);

Answer 1

Hello and sorry for that long time passed,
thank you for your answer!
If you are still interested at all:
I found that with 1.4 the "redundant" repainting of the panel's whole contents
takes place only when diagonally shrinking the application- or browser-window.
All other cases are drawn just once.
Frank