Java通俗易懂系列设计模式之装饰模式

public interface Car {
    void drive();
}

public class BMW implements Car {
    @Override
    public void drive() {
        System.out.println("宝马汽车，风驰电掣。");
    }
}

public abstract class WeddingCarDecorator implements Car{

    private Car decoratorCar;

    public WeddingCarDecorator(Car decoratorCar) {
        this.decoratorCar = decoratorCar;
    }

    @Override
    public void drive() {
        decoratorCar.drive();
    }
}

public class BMWWeddingCar extends WeddingCarDecorator {

    public BMWWeddingCar(Car decoratorCar) {
        super(decoratorCar);
    }

    @Override
    public void drive() {
        beautify();
        super.drive();
    }

    private void beautify() {
        System.out.println("结婚婚车，铺上鲜花，系上气球。");
    }
}

public class DecoratorDemoMain {

    public static void main(String[] args) {

        System.out.println("------正常的德系宝马------");
        BMW bmw = new BMW();
        bmw.drive();
        System.out.println("------作为婚车的德系宝马------");
        BMWWeddingCar bmwWeddingCar = new BMWWeddingCar(bmw);
        bmwWeddingCar.drive();
    }
}