Problem z pobraniem canvansa do BufferedImage

Witam
Mój problem polega na tym ze zamiast pobierać obraz z płótna pobiera z background frema
i nie mam zielonego pojęcia dlaczego tak się dzieje :)
Za wszelka pomoc z góry dziękuje

oto program

import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;

public class  Obraz extends Frame implements ItemListener 
{


Button b1;
Canvas Plutno ;
int x,y;
int w=400,h=400;
boolean stan=false;
Color kolor=Color.red; 
List listaKolorow;

public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D)g;
 }   

 
	Obraz()
	{
	super("Obraz");
	setSize(500,500);
	setResizable(false); 
	GrafInte();
	
	

	}
	  public void GrafInte()
	  {
	setLayout(new BorderLayout());
	Panel kontrola1 = new Panel();
	Panel kontrola2 = new Panel();
	b1 = new Button("Save");
	Plutno =new Canvas();
	listaKolorow = new List(4, false);
	listaKolorow.add("Czarny");
	listaKolorow.add("Czerwony");
	listaKolorow.add("Niebieski");
	listaKolorow.add("Zolty");
	listaKolorow.add("Zielony");
	listaKolorow.add("Brazowy");

	Plutno.setSize(h,w);
	Plutno.setBackground(Color.white);
	
    
	kontrola1.add(b1);
	kontrola1.add(listaKolorow);
	kontrola2.add(Plutno);
	
	add(kontrola1,BorderLayout.SOUTH);
	add(kontrola2,BorderLayout.CENTER);
	b1.addActionListener(new B1());
	listaKolorow.addItemListener(this);
	
	
	
	Plutno.addMouseMotionListener(new MouseMotionAdapter()
		{ 
		public void mouseDragged(MouseEvent e)
			{
			x = e.getX();
            y = e.getY(); 
			//setForeground(Color.black);
          
			Plutno.getGraphics().fillOval(x,y,5,5);
			
			//repaint();
			
	
			}
		});
	}
	 
	    private void save(BufferedImage image) {
        String ext = "jpg";  
        File file = new File("Image." + ext);
        try {
            ImageIO.write(image, ext, file);
        } catch(IOException e) {
            System.out.println("write error: " + e.getMessage());
        }
    }
 
 private BufferedImage makeImage(Canvas Plutno) {
        
        int type = BufferedImage.TYPE_INT_RGB;
        BufferedImage image = new BufferedImage(w,h,type);
        Graphics g2 = image.createGraphics();
		
        Plutno.paint(g2);
        g2.dispose();
        return image;
    }
		
		
	
	
	class B1 implements ActionListener 
	{
        public void actionPerformed(ActionEvent e) 
		{
		
            
           save(makeImage(Plutno));
           

			
		}
	}
	
	
        public void itemStateChanged(ItemEvent event)
		{
		 Object source=event.getSource();
		
		if (listaKolorow.getSelectedIndex() ==0)
			{
			setForeground(Color.black);
			repaint();
			
			}if (listaKolorow.getSelectedIndex() ==1)
			{
			
			setForeground(Color.red);
			
			repaint();
			
			}if (listaKolorow.getSelectedIndex() ==2)
			{
			setForeground(Color.blue);
			repaint();
			}if (listaKolorow.getSelectedIndex() ==3)
			{
			setForeground(Color.yellow);
			repaint();
			}if (listaKolorow.getSelectedIndex() ==4)
			{
			setForeground(Color.green);
			repaint();
			}if (listaKolorow.getSelectedIndex() ==5)
			{
			setForeground(Color.pink);
			repaint();
			}
			
		}
	


public static void main(String args[])
{

Frame Okno=new Obraz();
Okno.setBackground(Color.black);





	Okno.addWindowListener(new WindowAdapter()
	{
        public void windowClosing(WindowEvent e)
		{
        System.out.println("Dziekujemy za prace z programem...");
		System.exit(0);
		}
		

	});
	
	

Okno.setVisible(true);
}
}