Duvida Sobre passagem de form

public class ForcaVendaMidlet extends MIDlet implements ActionListener {
    public void startApp() 
    {
        Display.init(this);
        frmLogin login = new frmLogin();
        login.show();

    }

    public void pauseApp()
    {

    }

    public void destroyApp(boolean unconditional)
    {
        
    }

    public void actionPerformed(ActionEvent arg0)
    {


    }
}

public class frmLogin extends Form implements ActionListener
{
    Label lbUsuario = null;
    Label lbSenha   = null;
    TextField tfUsuario = null;
    TextField tfSenha = null;
    Command exitCommand = null;
    GridLayout Layout = null;
    Container container = null;

    /**
     * Construtor Da Classe
     */
    public frmLogin( )
    {
        super("Forca Venda");

        lbUsuario = new Label("Usuario:");
        lbSenha   = new Label("Senha:");

        tfUsuario = new TextField(15);
        tfSenha   = new TextField(15);


    }

    public void show()
    {
        super.show();
        GuiLogin();
        
    }

    public void GuiLogin()
    {
        exitCommand = new Command("Sair");

        this.addCommand(exitCommand);

        Layout = new GridLayout(2, 2);

        container = new Container(Layout);
        container.addComponent(lbUsuario);
        container.addComponent(tfUsuario);
        container.addComponent(lbSenha);
        container.addComponent(tfSenha);

        this.addComponent(container);
    }

    public void actionPerformed(ActionEvent event)
    {
        if(exitCommand == event.getSource())
        {

        }

    }

}