swt 中显示图片（eclipse Jface）

        Canvas canvas = new Canvas(container, SWT.NONE);
        canvas.setBounds(10, 269, 167, 88);
        
        ImageDescriptor descriptor=null;
        try {
            descriptor = ImageDescriptor.createFromURL(new URL("http://www.cnsucc.com/face/image/logo.jpg"));
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        final Image dogImage = descriptor.createImage(); 
        canvas.addPaintListener(new PaintListener() {
            public void paintControl(final PaintEvent event) {
            if (dogImage != null) {
            event.gc.drawImage(dogImage, 0, 0);
            }
            }
            });

http://www.bianceng.cn/Programming/Java/201104/25808_7.htm

        Canvas canvas = new Canvas(container, SWT.NONE);
        canvas.setBounds(10, 269, 167, 88);
        final Image dogImage =new Image (Display.getCurrent(), "D:\\about.png");
        canvas.addPaintListener(new PaintListener() {
            public void paintControl(final PaintEvent event) {
            if (dogImage != null) {
            event.gc.drawImage(dogImage, 0, 0);
            }
            }
            });