Java swing - exercise [closed]

I'm doubtful about Container, I'd like to know if the way I've done is correct.

public class Exercicio2 {
public static void main(String[] args) {

    JLabel lblTitulo = new JLabel(); 
    JLabel lblLogin = new JLabel();
    JLabel lblPassword = new JLabel(); 
    JTextField jTFLogin = new JTextField();
    JPasswordField jPFPassword = new JPasswordField();
    JButton btnOk = new JButton();
    JButton btnCancelar = new JButton();        
    JFrame jFrameLogin = new JFrame();          
    Container container = jFrameLogin.getContentPane();
    jFrameLogin.setContentPane(container);
    container.setLayout(null);
    lblTitulo.setFont(new Font("Arial",Font.BOLD, 12));
    lblTitulo.setBounds(90, 20, 180, 185);
    lblTitulo.setForeground(Color.red);
    container.add(lblTitulo);
    lblLogin.setText("Insira seu login!");
    container.add(lblLogin);
    lblPassword.setBounds(20, 90, 53, 15);
    container.add(lblPassword);
    jTFLogin.setBounds(80, 90, 210, 20);
    jTFLogin.setText("Insira seu login!");
    container.add(jTFLogin);
    jPFPassword.setBounds(80, 90, 210, 20);
    container.add(jPFPassword);
    JPanel jPanelBotoes = new JPanel();
    jPanelBotoes.setBounds(30, 120, 280, 60);
    jPanelBotoes.setLayout(null);
    jPanelBotoes.setBackground(Color.blue);
    container.add(jPanelBotoes);
    btnOk.setBounds(70, 20, 47, 23);
    jPanelBotoes.add(btnOk);
    btnCancelar.setBounds(150, 20, 75, 23);
    btnCancelar.setToolTipText("Sair do Programa");
    jPanelBotoes.add(btnCancelar);   
    }}

The exercise asks:

jFrameLogin: use the pack (); Set the Intermediate Container to setLayout (null);