[Java]repaint() won't reload the screen

[Adil]

So, any way, here's my code:

package core;
/**
 * @author Adil
 *
 */

import java.awt.*;
import javax.swing.JFrame;
import javax.swing.ImageIcon;
@SuppressWarnings("serial")
public class Core extends JFrame{
public static void main(String[] args) {

DisplayMode dm = new DisplayMode(800,600,16,DisplayMode.REFRESH_RATE_UNKNOWN);
Core i = new Core();
i.run(dm);

}
//variables for image loading below
public Screen s;
public Image bg;
public boolean loaded = false;

//run method below
public void run(DisplayMode dm){
setBackground(Color.BLACK);
setForeground(Color.WHITE);
setFont(new Font("Ubuntu", Font.PLAIN, 24));
s = new Screen();
loaded = false;
 
try{
s.setScreenSize(dm, this);
loadbg();
try{
                    Thread.sleep(5000);
}catch (Exception ex){}
}finally {
s.RestoreScreen();
}
}
  
public void loadbg() {
bg = new ImageIcon("file:\\\\home\\adil\\Desktop\\pack_2\\bgame.jpg").getImage();
loaded = true;
repaint();
}
   
public void paint(Graphics g){
if(g instanceof Graphics2D){
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
}
if(loaded){g.drawImage(bg,0,0,null);
}
}
}

What I want to do, is repaint the canvas with my image when the boolean "loaded" becomes true. This is not working. Any ideas why?