Thread: Reg:extending a jpanel

Hi all,

I m working with small java application called personal expenses database.
in my application i have a one jframe and two panels called login_panel and reg_panel.
login_panel is in inside the jframe.
reg_panel is a separate class that extends jpanel.

if click a create new account button,login_panel will be removed and reg_panel will be added.
what my question is, how can i get back to the original jframe after click the back button on reg_panel.

i have tried lot of things (ie. sending the contentpane reference to reg_panel object)
but i seem not working.

anyone pls help me.thanks in advance.

this is my main frame
public class login extends JFrame {

//some code

public void run(){

GUI related code goes here
}
public void actionPerformed(ActionEvent e){

if(e.getSource()==reg){
Registration r=new Registration()
r.setVisible(true);
SwingUtilities.invokeLater(r)
}
}

another panel
public class Registration extends JPanel

{


some code

}
after click a register button the Registration panel will be added.
then how i go back to login panel?

Thank you

public class login extends JFrame {

//some code

public void run(){

GUI related code goes here

login_panel=new JPanel();
getContentPane().add(loign_panel);
}
public void actionPerformed(ActionEvent e){

if(e.getSource()==reg){
Registration r=new Registration()
r.setVisible(true);
SwingUtilities.invokeLater(r)
}
}

another panel
public class Registration extends JPanel

{


login_panel=new JPanel();//this is the place compliler says null pointer exception
login_panel.setVisible(false);
login_panel.setVisible(true);

}

because Registration is a separate class that extending JPanel. not inside in main frame.
main frame only has login panel.login panel have register button to navigate Registration panel.

And Registration panel has a back button.after i click the back button i want to go back to login panel.
how to do that?

Originally Posted by mohamed_mashood

because Registration is a separate class that extending JPanel. not inside in main frame.
main frame only has login panel.login panel have register button to navigate Registration panel.

And Registration panel has a back button.after i click the back button i want to go back to login panel.
how to do that?

pls help me.i need a solution immediately.
thank you