JNI native drawing - Double Buffering issue

Question

Hi,
I use JNI to paint from a C++ DLL onto a canvas, which works fine.
The problem is that double buffering is not working though.
In C++ I create an offscreen HDC, draw something on it and finally i bitblit the offscreen HDC to the parent window HDC.
That is how double buffering is supposed to work. But each time i repaint my Canvas in Java, i see flickering:
the background color is displayed first, then the C++ paintings are drawn.
Since i already do double buffering in my C++ drawings, i don't know why there still is flickering.
Should i do double buffering on my canvas also?
How would this work, since my paint method looks like;
     private native void drawChart(Graphics g);
     public void paint(Graphics g)
          drawChart(g);
     }

Answer 1

this is my lucky day :)
the following thread on http://forum.java.sun.com/thread.jspa?threadID=562392&messageID=2767046 suggested to override the update method on the canvas, which works.
     // overridden to eliminate flicker
    public void update(Graphics g)
        paint(g);
    }