Please help! Image only shows when i use Applets instead of Frame/JFrame

Question

The following classes don't work because the Canvas shows just background colour. However, when I let my class "MyContainer" extend Applet instead(and running the Applet instead of the StartUp class that creates a JFrame) of Frame/JFrame i get my Image on the Canvas showing, WHY?
code:
public class StartUp {
public static void main(String[] arg) {
MyContainer my = new MyContainer();
     my.setSize(500, 400);
     my.setVisible(true);
public class MyContainer extends JFrame {
MyCanvas m;
public void MyContainer() {
     m=new MyCanvas();
     this.setSize(320, 320);
this.setLayout(new GridLayout(1, 1, 0, 0));
this.add(m);
this.setVisible(true);
public class MyCanvas extends Canvas {
Image im;
public MyCanvas() {
im=Toolkit.getDefaultToolkit().createImage("c:\\miniferrari.jpg");
try {
jbInit();
catch(Exception e) {
e.printStackTrace();
public void paint(Graphics g) {
g.drawImage(im, 0, 0, this);
private void jbInit() throws Exception {
this.setBackground(Color.darkGray);

Answer 1

as you are using a JFrame, you should refer to it's contentpane:
this.getContentPane().setLayout(new GridLayout(1, 1, 0, 0));
this.getContentPane().add(m);