Saving the graphics2d to JPEG

Question

Hi All,
I need a desperate solution for this problem. I am not able to save the contents of the Graphics2D content into an JPEG/GIF. could you pls tell me where I am going wrong.
private void pathCoordinates(int iOne, int jOne, int iTwo, int jTwo,
                    double y1Diff, double x1Diff,
                  double y2Diff, double x2Diff,
                 int seriesNum, int activeTime){
   Graphics2D g2d;       
   Point2D vOne1 = at.transform(new Point2D.Double(2*jOne-1,2*iOne-1), null);
    Point2D vOne2 = at.transform(new Point2D.Double(2*jOne+1,2*iOne+1), null);
    Point2D vTwo1 = at.transform(new Point2D.Double(2*jTwo-1,2*iTwo-1), null);
    Point2D vTwo2 = at.transform(new Point2D.Double(2*jTwo+1,2*iTwo+1), null);
    double xOne = Math.floor(Math.min(vOne1.getX(),vOne2.getX()));
    double yOne = Math.floor(Math.min(vOne1.getY(),vOne2.getY()));   
    double xTwo = Math.floor(Math.min(vTwo1.getX(),vTwo2.getX()));
    double yTwo = Math.floor(Math.min(vTwo1.getY(),vTwo2.getY()));
    xOne = xOne + x1Diff + 54;
    yOne = yOne + y1Diff + 54;
    xTwo = xTwo + x2Diff + 54;
    yTwo = yTwo + y2Diff + 54;   
    Point2D.Double p1 = new Point2D.Double(xOne ,yOne );
    Point2D.Double p2 = new Point2D.Double(xTwo ,yTwo );
    debug("X1 = " + xOne + " Y1 = " + yOne  + " X2 = " + xTwo + " Y2 = " + yTwo);
    Shape line = new Line2D.Double(xOne ,yOne, xTwo ,yTwo);
         red = (int) (256 * Math.random());         
     green = (int) (256 * Math.random());          
     blue = (int) (256 * Math.random());          
    g2d = (Graphics2D)this.getGraphics();
    g2d.setPaint(new Color(red,green,blue));   
    g2d.setStroke(new BasicStroke(3));   
    g2d.draw(line);
    drawArrowHeads(yOne ,xOne, yTwo ,xTwo, g2d);
    GraphicsConfiguration gc = g2d.getDeviceConfiguration();
    // I tried this options too.. didnt work. gives me either a white or a
    // Black image.
    //  g2d.setColor(Color.white);
    //  g2d.fillRect(0, 0, width, height);
    BufferedImage image = gc.createCompatibleImage(width,height, BufferedImage.TYPE_INT_RGB);
    Graphics g = image.createGraphics();   
    g.setColor(Color.white);
    g.fillRect(0,0,width, height);
    g.dispose();
    try {
        OutputStream out = new BufferedOutputStream(new FileOutputStream("screen.jpg"));
        ImageIO.write(image, "jpeg", out);
    }catch(IOException e){
         debug(e.getLocalizedMessage());
    Timer timer = new Timer();   
    timer.schedule(new TrackingTimerTask(), activeTime);
  }thanks in advance
Domnic

Answer 1

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.swing.*;
public class Dynamics
    public Dynamics()
        DynamicPanel dynamicPanel = new DynamicPanel();
        ImageSupport imageSupport = new ImageSupport(dynamicPanel);
        Updater updater = new Updater(dynamicPanel, imageSupport);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(updater.getUIPanel(), "North");
        f.getContentPane().add(dynamicPanel);
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
        dynamicPanel.setImage(imageSupport.createImage());
    public static void main(String[] args)
        new Dynamics();
class DynamicPanel extends JPanel
    BufferedImage image;
    protected void paintComponent(Graphics g)
        g.drawImage(image, 0, 0, this);
    public void setImage(BufferedImage bi)
        image = bi;
        repaint();
class Updater
    DynamicPanel dynamicPanel;
    ImageSupport imageSupport;
    Random seed;
    int R;
    BufferedImage image;
    public Updater(DynamicPanel dp, ImageSupport is)
        dynamicPanel = dp;
        imageSupport = is;
        seed = new Random();
        R = 75;
    private void addLine()
        Point p1 = getLocation(0);
        Point p2 = getLocation(0);
        updateImage(new Line2D.Double(p1.x, p1.y, p2.x, p2.y));
    private void addCircle()
        Point p = getLocation(R);
        updateImage(new Ellipse2D.Double(p.x - R/2, p.y - R/2, R, R));
    private void addSquare()
        Point p = getLocation(R);
        updateImage(new Rectangle2D.Double(p.x - R/2, p.y - R/2, R, R));
    private Point getLocation(int pad)
        Point p = new Point();
        p.x = pad/2 + seed.nextInt(imageSupport.bi.getWidth() - pad);
        p.y = pad/2 + seed.nextInt(imageSupport.bi.getHeight() - pad);
        return p;
    private void updateImage(Shape s)
        Graphics2D g2 = imageSupport.bi.createGraphics();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setPaint(Color.black);
        g2.draw(s);
        g2.dispose();
        dynamicPanel.repaint();
    public JPanel getUIPanel()
        final JButton
            line   = new JButton("line"),
            circle = new JButton("circle"),
            square = new JButton("square"),
            save   = new JButton("save");
        ActionListener l = new ActionListener()
            public void actionPerformed(ActionEvent e)
                JButton button = (JButton)e.getSource();
                if(button == line)
                    addLine();
                if(button == circle)
                    addCircle();
                if(button == square)
                    addSquare();
                if(button == save)
                    imageSupport.save();
                    dynamicPanel.setImage(imageSupport.createImage());
        line.addActionListener(l);
        circle.addActionListener(l);
        square.addActionListener(l);
        save.addActionListener(l);
        JPanel panel = new JPanel();
        panel.add(line);
        panel.add(circle);
        panel.add(square);
        panel.add(save);
        return panel;
class ImageSupport
    DynamicPanel dynamicPanel;
    BufferedImage bi;
    public ImageSupport(DynamicPanel dp)
        dynamicPanel = dp;
    public BufferedImage createImage()
        int w = dynamicPanel.getWidth();
        int h = dynamicPanel.getHeight();
        bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = bi.createGraphics();
        g2.setPaint(Color.white);
        g2.fillRect(0, 0, w, h);
        g2.dispose();
        return bi;
    public void save()
        try
            ImageIO.write(bi, "jpg", new File("dynamics.jpg"));
        catch(IOException ioe)
            System.err.println("write: " + ioe.getMessage());
}