import java.awt.*;
import java.applet.*;
       
       
public class DrawExample extends Applet {
       Point startPoint;
       Point points[];
       int numPoints;
       boolean drawing;
         
       public void init()  {
           startPoint= new Point(0,0);
           points=new Point[1000];
           drawing=false;
           resize(300,400);
       }
         
       public void paint(Graphics g) {
           int oldX=startPoint.x;
           int oldY=startPoint.y;
           for(int i=0; i<numPoints; ++i) {
               g.drawLine(oldX, oldY, points[i].x,points[i].y);
               oldX=points[i].x;
               oldY=points[i].y;
           }
       }
         
       public boolean mouseDown(Event evt, int x, int y) {
           if(!drawing) {
               startPoint.x=x;
               startPoint.y=y;
           }
           drawing=!drawing;
           return true;
       }
         
       public boolean mouseMove (Event evt, int x, int y) {
           if((drawing)&&(numPoints<1000)) {
               points[numPoints]=new Point(x,y);
               ++numPoints;
               repaint();
           }
           return true;
       }
}