JMenuBar is hidden by Canvas

Question

Hi,
I have a class that extends JFrame, this has a JMenuBar set to it (set with setJMenuBar method of JFrame) and is displayed fine until i try to add a java.awt.Canvas object to the center of the JFrame(using a BorderLayout) . When this canvas has been added then you can still click on the JMenu names in the JMenuBar but the JMenu itself is no hidden behind the canvas. Here is some of the code
Class that extends JFrame's constructor
//call the super constructor
          super("My Image Viewer");
          //get the content pane
          c = getContentPane();
          //set the layout of the frame
          c.setLayout(new BorderLayout());
          //create a new MenuHandler
          menuHandler = new MenuHandler();
          //create a new JFileChooser
          fileChooser = new JFileChooser("C:/Documents and Settings/"
                    + "Irene Stephanie/My Documents");
          //create a new file filter
          filter = new ImgFilter();
          //assign the file filter
          fileChooser.setFileFilter(filter);
          //create a new window canvas
          canvas = new WindowCanvas();
          add("Center", canvas);
          //set up the menus
          initMenu();
          //set the JMenuBar
          setJMenuBar(menuBar);
          //Set the window size
          setSize(640, 480);
          //make the window visible
          setVisible(true);Class that extends Canvas
public class WindowCanvas extends Canvas{
     public WindowCanvas(){
          super();
     public void paint(Graphics g){
     }Please not that it works if you add the JMenuBar to the South position, and that you can draw in the canvas, but you cannot see the JMenu's.
Any help will be greatly apreciated
Andy

Answer 1

A Canvas is a heavyweight component. By default, Swing menus are lightweight components. You need to call
JPopupMenu.setDefaultLightWeightPopupEnabled(false);before creating your menus.