Overlaying rectangle over a scatter chart

[whahahaha]

What I am trying to do:


What I have tried:
public void customize(JFreeChart chart, JRChart jasperChart) {
BufferedImage image = chart.createBufferedImage(20, 20);
Graphics2D g2 = image.createGraphics();

g2.setColor(Color.RED);
g2.fill(new Rectangle2D.Double(1, 1, 5, 5));

chart.draw(g2, new Rectangle(10, 10, 20, 20));
chart.fireChartChanged();
chart.setTitle("abcd");
}

But i failed =(

[david.gilbert]

If the rectangle is in a fixed location, you could add an XYBoxAnnotation to the chart.

[whahahaha]

Awesome, it worked. Thank you very much . Just saved me from getting fired =D