Question

I am having problem displaying my Main Menu on the screen. I don’t see where the problem is. All it is displaying is a blank JFrame window. It is not showing my panel with the buttons.

Main Class:

public class Main {

public static void main(String[] args) {
    GUIView gui = new GUIView();

}
}

GUIView Class:

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

public class GUIView {
protected JFrame frame;
    public GUIView() {


    frame = new JFrame("Test");
        frame.setVisible(true);
        frame.setSize(500,500);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

}

MainMenu Class:

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

public class MainMenu extends GUIView {
    private JButton b1, b2, b3;
    private JPanel panel;
    public MainMenu() {
        GridBagLayout gridbag = new GridBagLayout();
        b1 = new JButton();
        b2 = new JButton();
        b3 = new JButton();

    //Button Settings;
    b1.setText("Administrator");
    b2.setText("Program Leader");
    b3.setText("Lecturer");

    //Panel Settings
    panel = new JPanel();
    panel.setLayout(gridbag);
    panel.add(b1);
    panel.add(b2);
    panel.add(b3);
    panel.setVisible(true);
    super.frame.add(panel);
}

}

Answer 1

You never create an instance of MainMenu. To fix, you could do:

public static void main(String[] args) {
   GUIView gui = new MainMenu();
}