jar -cmf manifest classes.jar filef. class  frameEx. class 

 public   class  frame  extends  Frame{
 int  offset= 0 ;
 int  strok= 0 ;
frame(){
        addKeyListener( new  keyEventList());
        addWindowListener( new  windowEventList());
}
 public   void  paint(Graphics g){
...
 int  colStrok=Math.round(( float )(d.getHeight()-curY)/height12)+strok;
curY= 50 -offset;
...
}
 class  windowEventList  extends  WindowAdapter{
         public   void  windowClosing(WindowEvent w){
            System.exit( 0 );
        }
    }
 class  keyEventList  extends  KeyAdapter{
          public   void  keyPressed(KeyEvent e){
                 keycode=e.getKeyCode();
                 if (keycode== 40 ){  
                    offset+= 15 ;
                    strok++;
                    repaint();//}
                }               
                  if (keycode== 38 ){  
                      if (offset== 0 ){
                     } else {
                    offset-= 15 ;
                    repaint();}
                 }
            }
    }
    }