Button help

Hello

i'm trying to make a simple program and when i press a button i open up a new window but how do i make the old one disappear?
can't find out how i'm doing :S

here is my code for the window that i want to disappear

Code :

---

 
import java.awt.*;
import javax.swing.*;
 
public class Bank {
	public static void main(String [] args)	{
	JFrame frame = new JFrame();
	frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	frame.setLayout(new FlowLayout());
	frame.setSize(new Dimension(300, 159));
	frame.setTitle("Login");
 
	JButton login = new JButton();
	login.setText("Login");
	frame.setLayout(new BorderLayout());
	JPanel north = new JPanel(new GridLayout(3, 3));
	north.add(new JLabel ("Username: "));
	north.add(new JTextField());
	north.add(new JLabel ("Password: "));
	north.add(new JTextField());
	north.add(new JLabel (""));
	north.add(login);
	login.addActionListener(new login());
 
 
	frame.add(north, BorderLayout.NORTH);
 
	frame.setVisible(true);
 
	}
}

---

hope someone can help me :)

If you want a window to "disappear" usually it's better to use a dialog such as a JDialog or the related JOptionPane. Then to make it disappear you can simply call setVisible(false) or dispose() on the dialog in the event where you want it to disappear.

Thanks alot :)