JComponents not showing up with picture background?

Question

My components are not showing up. How do I fix this?

Code:

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener         


        

Answer 1

window.setVisible(true); should be invoked only after all the components have been added to the frame.
 void logini() throws IOException {
        JFrame window = new JFrame("Login");
        JPanel mainp = new JPanel(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();
        window.add(mainp);

        BufferedImage myPicture = ImageIO.read(new File("c:\\bgd.png"));
        JLabel picLabel = new JLabel(new ImageIcon( myPicture ));
        mainp.add(picLabel, c);

        c.gridx = 0;
        c.gridy = 1;
        gusername = new JTextField();
        gusername.setText("Username");
        mainp.add(gusername, c);

        c.gridx = 0;
        c.gridy = 2;
        gpassword = new JTextField();
        gpassword.setText(" password ");
        mainp.add(gpassword, c);

        c.gridx = 0;
        c.gridy = 3;
        JButton login = new JButton("Login");
        mainp.add(login, c);

        login.addActionListener(this);
        login.setActionCommand("ok");

        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setSize(500, 250);
        window.setResizable(false);
        window.setVisible(true);
    }