Multiple windows

import javax.swing.*;
import javax.swing.JMenuBar;
import java.awt.*;
import java.awt.event.*;

public class test extends JFrame implements ActionListener
{
	JButton butt1 = new JButton("Test"); // new button 
	JPasswordField pass = new JPasswordField(20);   // new password field
	JMenu mnu = new JMenu("File"); // new menu
	JMenuItem mnu_1 = new JMenuItem("....");  // new menu Item
	JMenuBar bar = new JMenuBar(); // new menu Bar -- to put the menu in
	newWindow test2;  // variable of the other window
	
	public test() // constructor
	{
	    super("Test");  // title
	    setSize(300,100); // size
	    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	    pass.setEchoChar('*');
	    mnu.add(mnu_1); // add the menu items in the menu
	    bar.add(mnu);  // add the menu in the menu bar
	    JPanel panel = new JPanel();  // new Panel
	    butt1.addActionListener(this);  // add ActionListener to the button
	    setJMenuBar(bar);  // set the Menu Bar
	    panel.add(pass);  // add the Password Field
	    panel.add(butt1);  // add the button
	    setContentPane(panel);
	 }
	 
	 public static void main(String args[])  // main function
	 {
	     JFrame ts = new test(); // new object of the class "test"
	     ts.show();
	 }
	 
	 public void actionPerformed(ActionEvent evt)  // function to control the ActionListener
        {
        Object src = evt.getSource();
        if(src == butt1)
        {
            setVisible(false);
            test2 = new newWindow();
            test2.show();
        }
        }
}