Draw on top of picture

[LordLothar]

I have a picture added to my jpanel content pane like this: imagePanel = new ImagePanel(); contentPane.add(imagePanel, BorderLayout.CENTER);

File selectedFile = new File("map.jpg");
currentImage = ImageFileManager.loadImage(selectedFile);

    imagePanel.setImage(currentImage);
    frame.pack();

How I can draw a circle on top of that loaded picture? Thanks in advance, Im new in this area.