problems with jDialog in a JFrame

[bbq]

I have a JFrame in which when I click in JButton appears a JDialog.

The problem is that doesn’t do anything when I click register button
my code is:

public class recordpage extends JDialog{ 
     
    private Container contain; 
    private JLabel Nick,  Pass,  ConfimPass,  Mail; 
    private JTextField textNick, textMail; 
    private JPasswordField textPass, textConfirmPass; 
    private JButton register; 
     
     public recordpage  (){ 
          
        super(); 
        Container contain =getContentPane(); 
        contain.setLayout(new FlowLayout()); 
        JLabel Nick =new JLabel("Nick "); 
        JLabel Pass =new JLabel ("password "); 
        JLabel ConfimPass new JLabel ("Confirm your password"); 
        JLabel Mail =new JLabel ("your email: "); 
        JTextField textNick =new JTextField ("", 10); 
        JPasswordField textPass =new JPasswordField("", 10); 
        JPasswordField textConfirmPass=new JPasswordField("", 10); 
        JTextField textMail =new JTextField("", 10); 
        JButton register=new JButton ("Log in"); 
        contain.add(Nick); 
        contain.add(textNick); 
        contain.add(Pass); 
        contain.add(textPass); 
        contain.add(ConfirmPass); 
        contain.add(textConfirmPass); 
        contain.add(Mail); 
        contain.add(textMail); 
        contain.add(register); 
        this.setTitle("Register"); 
        this.setModal(true); 
        this.setLocation(200, 150); 
        this.setSize(new Dimension(300, 180)); 
        this.setVisible(true); 
        registrar.addActionListener ( 
            new ActionListener(){ 
                public void actionPerformed(ActionEvent ae){ 
                    dispose(); 
                } 
            } 
        ); 
         
    } 
       
}

thanks

[Jack]

You're declaring JButton 2 times. One as class attribute and other as local variable of the method