How do I switch between JPanels of different classes? I do not wish to use a Card Layout.
I have 2 classes - MainPage & MenuPage. For instance, I would like to clear the contentPane (a JPanel) @ MainPage and replace it with the content pane @ MenuPage. For testing purposes, I included a button @ MenuPage.
Please see my following attempt - it gives an error:
java.lang.IllegalArgumentException: adding a window to a container
MainPage
public class MainPage extends JFrame {
private static JPanel contentPane;
private JLabel imgBackground;
private JLabel lblTitle;
private JLabel imgLogo;
private Dimension dim;
//timer
private final static int interval = 40;
private int i;
private Timer t;
//private JButton start;
//private JLabel lblLoading;
private JProgressBar pbar;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
MainPage frame = new MainPage();
frame.setVisible(true);
}
catch (Exception e) {
e.printStackTrace();
}
}
});
}
public MainPage() {
dim = Toolkit.getDefaultToolkit().getScreenSize();
System.out.println(dim);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(null);
contentPane.setBounds(0,0,dim.width,dim.height);
setContentPane(contentPane);
this.setExtendedState(JFrame.MAXIMIZED_BOTH);
t = new Timer (interval, new ActionListener(){
public void actionPerformed(ActionEvent e) {
if (i == 20){
t.stop();
//start.setEnabled(true);
//refresh + load next page ???
contentPane.removeAll();
MenuPage loadpanel2 = new MenuPage();
setContentPane(loadpanel2);
revalidate();
repaint();
}
else{
i++;
pbar.setValue(i);
}
}
});
t.start();
MenuPage
public class MenuPage extends JFrame {
private JPanel contentPane;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
MenuPage frame = new MenuPage();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public MenuPage() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(null);
setContentPane(contentPane);
JButton btnSadfsafsa = new JButton("sadfsafsa");
btnSadfsafsa.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
}
});
btnSadfsafsa.setBounds(10, 52, 89, 23);
btnSadfsafsa.setEnabled(true);
btnSadfsafsa.setVisible(true);
contentPane.add(btnSadfsafsa);
}
}
