# Decorator Pattern

public class DisplayRoad {
    public void draw() {
        System.out.println("기본 도로 표시");
    }
}

public class DisplayWithRoad extends DisplayRoad {
    public void draw() {
        super.draw();
        drawTraffic();
    }

    public void drawTraffic() {
        System.out.println("교통량 표시");
    }
}

public class DisplayWithRoadTraffic extends DisplayWithRoad {
    public void draw() {
        super.draw();
        crossing();
    }

    public void crossing() {
        System.out.println("교차료 표시");
    }
}

public void decorator() {
    DisplayRoad road = new DisplayRoad();
    road.draw();

    DisplayRoad roadWith = new DisplayWithRoad();
    roadWith.draw();

    DisplayRoad roadWithTraffic = new DisplayWithRoadTraffic();
    roadWithTraffic.draw();
}