Kras2.java
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.applet.*;

public class Kras2 extends JApplet 
                              implements MouseMotionListener, MouseListener
{
        private Point p, q;

        public void init()
        {
                addMouseMotionListener(this);
                addMouseListener(this);
                p = new Point();
                q = new Point();
        }

        public void paint(Graphics g)
        {
                Dimension d = getSize();
                g.drawRect(0, 0, d.width-1, d.height-1);
        }
        
        public void mouseDragged(MouseEvent e)
        {
                Graphics g = getGraphics();
                p.x = e.getX();
                p.y = e.getY();

                g.drawLine(q.x, q.y, p.x, p.y);
                q.x = p.x;
                q.y = p.y;
        }

        public void mouseMoved(MouseEvent e){}

        //bepalen van begintoestand waar de muis zich bevindt
        //als er mee geklikt wordt.
          public void mousePressed(MouseEvent e)
        {
                q.x = e.getX();
                q.y = e.getY();
        }

        // hier volgen een aantal verplichte (lege) methoden
        public void mouseReleased(MouseEvent e){}
        public void mouseClicked(MouseEvent e){}
        public void mouseEntered(MouseEvent e){}
        public void mouseExited(MouseEvent e){}
}