Putting an Image in JPanel

Question

I am trying to put an image in JPanel. Using something other than ImageIcon. When I run the program only a white screen appears.
package game;
import gui.FullScreenDisplay;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.Runnable;
import java.lang.Thread;
public class Runner implements Runnable
     private static final long serialVersionUID = 1L;
     private FullScreenDisplay display;
     public static void main(String args[])
          Thread t = new Thread(new Runner());
          t.start();
     public Runner()
          makeGui();
     private void makeGui()
          display = new FullScreenDisplay(this);
     public void run()
          try {
               Thread.sleep(1000);
          } catch (InterruptedException e) {/*Nothing to do*/}
          run();
     public void quit()
          System.exit(0);
package gui;
import game.Runner;
import java.awt.GraphicsEnvironment;
import java.awt.event.KeyEvent;
import javax.swing.KeyStroke;
import javax.swing.AbstractAction;
import java.awt.event.ActionEvent;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Graphics;
import java.awt.Image;
import javax.imageio.ImageIO;
import java.io.File;
import java.io.IOException;
public class FullScreenDisplay extends JFrame {
     private static final long serialVersionUID = 1L;
     private Runner master;
     private JPanel mainPanel;
     private Image tempImage;
     public FullScreenDisplay(Runner master)
          super();
          //Remove this eventually.
          try {
               tempImage = ImageIO.read(new File("test_image.jpg"));
          } catch (IOException e) {
               System.out.println("image get error");
               e.printStackTrace();
          this.master = master;
          makeFrame();
          makePanel();
          makeKeyBindings();
          //setFullScreen(chooseBufferStrategy());
          setFullScreen();
          requestFocus();
          setVisible(true);
          //Remove this eventually.
          Graphics g = tempImage.getGraphics();
          mainPanel.paint(g);
          this.update(g);
     private void makeFrame()
          setUndecorated(true);
          setResizable(false);
          setFocusable(true);
     private void makePanel()
          mainPanel = new JPanel(){
               public void paintComponent(Graphics g) {
                    if(tempImage == null){
                         System.out.println("Balls");
                    g.drawRect(10, 10, 10, 10);
                    g.drawImage(tempImage,0,0,null);
                    super.paintComponent(g);
                    System.out.println("Did it work");
          add(mainPanel);
     private void makeKeyBindings()
          mainPanel.setFocusable(true);
          //Key bindings... don't like using a string to index, find out if there's a better way.
          mainPanel.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), "exit");
          mainPanel.getActionMap().put("exit", new AbstractAction(){
               public void actionPerformed(ActionEvent e)
                    master.quit();
     /*private void chooseBufferSrategy()
     private void setFullScreen()
          GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().setFullScreenWindow(this);
}

Answer 1

super.paintComponent(g);should be the first line in paintComponent()
also, you don't really need the keyBindings to quit,
just set the default close to exit and Alt-F4 will close/quit