//BufferedImage bufferedImage=new BufferedImage( 450, 450, BufferedImage.TYPE_INT_RGB );
//pieChart2D.setGraphics2D( bufferedImage.createGraphics() );
pieChart2D.setGraphics2D( (Graphics2D) this.panel.getGraphics() );
pieChart2D.render();
//this.panel.getGraphics().drawImage( bufferedImage, 0, 0, this );