import com.imsl.chart.*;
import java.awt.image.BufferedImage;
import java.io.File;

public class SampleImageIO {
    public static void main(String argv[]) throws java.io.IOException {        
        Chart chart = createChart();
        chart.setScreenSize(new java.awt.Dimension(500,500));
        
        BufferedImage bi = new BufferedImage(500, 500, BufferedImage.TYPE_4BYTE_ABGR_PRE);
        chart.paintChart(bi.createGraphics()); 
        
        File file = new File("SampleImageIO.png");
        javax.imageio.ImageIO.write(bi, "PNG", file);       
    }
    

    static Chart createChart() {        
        Chart chart = new Chart();
        AxisXY axis = new AxisXY(chart);      
        
        int  npoints = 20;
        double dx = .5 * Math.PI/(npoints-1);
        double x[] = new double[npoints];        
        double y[] = new double[npoints];       

        //  Generate some data       
        for (int i = 0; i < npoints; i++){            
            x[i] = i * dx;            
            y[i] = Math.sin(x[i]);            
        }        
        new Data(axis, x, y);   
        return chart;
    }    
}