I know that i am not calling the graphics paint command in the mainframe in order to display it. but i'm not sure how. thanks in advance

import java.awt.*;
import javax.swing.*;
public class MainFrame extends JFrame {

private static Panel panel = new Panel();

public MainFrame() {
    panel.setBackground(Color.white);
    Container c = getContentPane();
    c.add(panel);
}

public void paint(Graphics g) {
    g.drawString("abc", 20, 20);
}

public static void main(String[] args) {
    MainFrame frame = new MainFrame();
    frame.setVisible(true);
    frame.setSize(600, 400);
    frame.setResizable(false);
    frame.setLocationRelativeTo(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}