Das Ganze noch mal mit einem Teil von deinem Code, etwas objektorientierter und mit CardLayout umgebaut. Das könnte so aussehen:
Das Applet:
[code=Java]import javax.swing.*;
import javax.imageio.*;
import java.awt.*;
import java.net.*;
import java.io.*;
import java.awt.event.*;
public class PictureApplet extends JApplet implements ActionListener {
private Image image;
private TestPanel tp;
private MyContentPane cp;
private JPanel cards;
public void init() {
setLayout(new BorderLayout());
try {
image = ImageIO.read(new URL(getCodeBase(), "Bild.jpg"));
}
catch(IllegalArgumentException iae) {
JOptionPane.showMessageDialog(this, "Grafikdatei nicht gefunden!");
}
catch(IOException ioe) {
JOptionPane.showMessageDialog(this, "Fehler beim Einlesen der Grafikdatei!");
}
cards = new JPanel(new CardLayout());
cp = new MyContentPane(this, image);
cards.add(cp, "MyContentPane");
tp = new TestPanel(this);
cards.add(tp, "TestPanel");
add(cards, BorderLayout.CENTER);
}
public void actionPerformed(ActionEvent e) {
JButton source = (JButton)e.getSource();
if(source.getText().equals("GEIL")) {
showMyContentPane();
}
else if(source.getText().equals("Klicken!")) {
showTestPanel();
}
}
public void showTestPanel() {
CardLayout cl = (CardLayout)(cards.getLayout());
cl.show(cards, "TestPanel");
}
public void showMyContentPane() {
CardLayout cl = (CardLayout)(cards.getLayout());
cl.show(cards, "MyContentPane");
}
}[/code]
Das MyContentPane:
[code=Java]import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MyContentPane extends JPanel {
private Image image;
public MyContentPane(PictureApplet pa, Image image) {
this.image = image;
setLayout(new GridBagLayout());
JButton b = new JButton("Klicken!");
b.addActionListener(pa);
add(b);
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
if (image != null) {
g.drawImage(image, 0, 0, this);
}
}
}[/code]
und das TestPanel:
[code=Java]import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestPanel extends JPanel {
public TestPanel(PictureApplet pa) {
setLayout(new BorderLayout());
JButton bt = new JButton("GEIL");
bt.addActionListener(pa);
add(bt, BorderLayout.SOUTH);
}
}[/code]
Wenn ich jetzt keine Fehler eingebaut habe, sollte das so funktionieren.
