Menu - why he no show - eh?

Question

Hi , does any one hav any ideas why the menu doesnt come down with the menu item on it with this code ?
any help would be gratefully reieved .. . .
public class Sketcher extends JFrame {
     private Canvas canvas;                              // The canvas to sketch on
     // Constructor for Sketcher class
     public Sketcher () {
          setSize(500, 500);                              // Set size of canvas
          setTitle("Sketch Pad");
          canvas = new Canvas();                         // Make canvas to draw in
          canvas.setBackground(Color.white);
          getContentPane().add(canvas, "Center");                         // and put it in the window
     public static void main (String[] args) {
          Sketcher f = new Sketcher();               // Fire constructor to make new Sketcher object
          MouseWatcher mw = new MouseWatcher();     // Wire up a mouse watcher listener
          f.canvas.addMouseListener(mw);               // listen for mouse events
          f.canvas.addMouseMotionListener(mw);               // listen for mouse motion
          f.show();     // make sketcher object window visible to user
          JMenuBar blackMenuBar = new JMenuBar();
        blackMenuBar.setOpaque(true);
        blackMenuBar.setBackground(Color.black);
        blackMenuBar.setPreferredSize(new Dimension(200, 20));
          f.setJMenuBar(blackMenuBar);
          JMenu menu = new JMenu("Menu");
          menu.setMnemonic(KeyEvent.VK_M);
          menu.getAccessibleContext().setAccessibleDescription("Main Menu");
          blackMenuBar.add(menu);
          //a group of JMenuItems
          JMenuItem menuItem1 = new JMenuItem("Clear",KeyEvent.VK_T);
          menuItem1.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, ActionEvent.ALT_MASK));
          menuItem1.getAccessibleContext().setAccessibleDescription("Clear all Rectangles");
          menu.add(menuItem1);
          f.pack();
          f.setVisible(true);
          f.addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) {
                    System.exit(0);
}cheers

Answer 1

I'm not exactly sure why (don't know much about Canvases), but it's something to do with the Canvas. If you take your code and just put a panel with a label in it instead of the Canvas, the menu works fine. Perhaps it's something about how the Canvas is painted? Maybe it never allows something to be drawn over it??