in your loop somewhere put.
​        path = PathFinding.generatePath(Player.getPosition(),Game.getDestination(),false);

        @Override
	public void onPaint(Graphics g) {

		Graphics2D g2d = (Graphics2D) g;
		if(path != null && path.length > 0){

                    for(RSTile tile : path){

                           if(tile.isOnScreen()){g2d.draw(Projection.getTileBoundsPoly(tile, 0));}

                    }

                 }
         }