Help with ImageIO

[romina]

I am trying to write a program which draws an image on the screen, allows the user to draw on top of that image, and then saves a jpg of what the user drew, MINUS THE ORIGINAL IMAGE.

import java.util.*;
import javax.imageio.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.io.*;
import java.awt.image.*;
import java.util.ArrayList;
import java.awt.Graphics;
import java.net.*;
import java.applet.*;

class MyPanel extends JPanel {
	
	Graphics save;
	Image blank;
	Image face;
	ArrayList x;
	ArrayList y;
	ImageObserver ob;
	
	private class MListen implements MouseMotionListener {
		
		public void mouseDragged(MouseEvent e){
			
			x.add(new Integer(e.getX()));
			y.add(new Integer(e.getY()));
			
			repaint();
			
		}
		
		public void mouseMoved(MouseEvent e){
			//do nothing
		}
		
	}
	
	public MyPanel(Image f){
		
		x=new ArrayList();
		y=new ArrayList();
		
		IMAGE b=new IMAGE();
		blank=b.run("/Users/erikschmidt90/Sites/blank.jpg");
		
		face=f;
		
		addMouseMotionListener(new MListen());
		
		x.add(new Integer(-30));
		y.add(new Integer(-30));
		
	}
	
	public void paintComponent(Graphics g){
		
		g.drawImage(face,0,0,ob);
		save=createImage(500,500).getGraphics();
		save.drawImage(blank,0,0,null);
		g.setColor(Color.black);
		save.setColor(Color.black);
		g.drawImage(face,0,0,ob);
		
		for(int i=0;i<x.size();i++){
			
			save.fillOval(((Integer)x.get(i)).intValue(),((Integer)y.get(i)).intValue(),20,20);
			g.fillOval(((Integer)x.get(i)).intValue(),((Integer)y.get(i)).intValue(),20,20);
			
		}
		
	}
	
	public Graphics getSave(){
		
		return save;
		
	}
	
}

class WListen extends WindowAdapter {
	
	public void WindowClosed(WindowEvent e){
		
		System.exit(0);
		
	}
	
}

class MainFrame extends JFrame {
	
	MyPanel panel;
	JButton submit;
	JPanel main;
	
	public MainFrame(Image face){
		
		super("Image Tracer");
		setSize(750,750);
		
		panel=new MyPanel(face);
		submit=new JButton("Save");
		submit.addActionListener(new MyActionListener());
		main=new JPanel(new BorderLayout());
		main.add(panel,BorderLayout.CENTER);
		main.add(submit,BorderLayout.SOUTH);
		
		setContentPane(main);
		
	}
	
	private class MyActionListener implements ActionListener {
		
		public void actionPerformed(ActionEvent e){
			
			Object source=e.getSource();
			
			if(source==submit){
				
				BufferedImage w=new BufferedImage(500,500,BufferedImage.TYPE_INT_RGB);
				Graphics g=w.getGraphics();
				g=panel.getSave().create();
				try{
				
					ImageIO.write(w,"jpg",new File("Output.jpg"));
				
				}catch(Exception ex){
					System.out.println(ex);
				}
				
			}
			
		}
		
	}
	
}

class IMAGE {
	
	public Image run(String filename){
		
		return Toolkit.getDefaultToolkit().createImage(filename);
		
	}
	
}

public class image_tracer {

    public static void main (String args[]) {
	
		IMAGE image=new IMAGE();
		MainFrame frame=new MainFrame(image.run("/Users/erikschmidt90/Sites/face.jpg"));
		frame.addWindowListener(new WListen());
		frame.show();
	
    }
}

the line about ImageIO only draws an all black image, not what the user drew

how do I get the second graphics context to the file, regardless of the format?Thanks

[trill]

If I can remember right ImageIO can only take one image...Not sure if it does or doesn't but you might want to just combine them together before you write it. Also I believe Java has issues with writing .jpgs. This I believe was from 1.5 or before not sure about the new 1.6

Greetings.