Scribble.java

import java.awt.*;
import java.awt.event.*;

public class Scribble extends Frame implements MouseListener,MouseMotionListener
{
public int last_x,last_y;
Scribble()
{
    this.addMouseListener(this);
    this.addMouseMotionListener(this);
    addWindowListener(new WindowAdapter()
    {
        public void windowClosing(WindowEvent e)
        {
            System.exit(0);
        }
    });
}
    public void mousePressed(MouseEvent e)
    {
        last_x=e.getX();
        last_y=e.getY();
    }
    public void mouseDragged(MouseEvent e)
    {
        Graphics g=this.getGraphics();
        int x=e.getX(),y=e.getY();
        g.drawLine(last_x,last_y,x,y);
        last_x=x;
        last_y=y;
        
    }
    public void mouseClicked(MouseEvent e){}
      public void mouseEntered(MouseEvent e){}
        public void mouseExited(MouseEvent e){}
          public void mouseMoved(MouseEvent e){}
            public void mouseRelease(MouseEvent e){}
              
    

public static void main(String args[])
{
Scribble k=new Scribble();
 k.setTitle("scribble");
 k.setSize(450,400);
k.setVisible(true);
}

    @Override
    public void mouseReleased(MouseEvent me) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
}