装饰模式--- 结构型模式

适用场景,不断组合一些功能组件的时间用

JDK中,输入流输出流就用了这个模式 ()各种inputStrem传入返回inputStream)

UML图如下

 

Icar类

public interface ICar {

    void run();
}

car类

public class Car implements ICar{
    @Override
    public void run() {
        System.out.println("普通的run");
    }
}

superCar类

public class SuperCar extends Car {
    private Car car;

    public SuperCar(Car car) {
        this.car = car;
    }

    public void run(){
        car.run();
    }
}

这个是最核心的,因为重写的run方法,实际调用的是穿进来的car对象的run方法

 

AICar类

public class AiCar extends SuperCar {
    public AiCar(Car car) {
        super(car);
    }

    public void AiRun(){
        System.out.println("ai run");
    }

    @Override
    public void run() {
        AiRun();
        super.run();
    }
}

 

Water类

public class WaterCar extends SuperCar {

    private Car car;
    public WaterCar(Car car) {
        super(car);
    }

    public void water(){
        System.out.println("水上 run");
    }
    @Override
    public void run() {
        water();
        super.run();
    }
}

 

cient调用

    public static void main(String[] args) {

        Car Car = new WaterCar( new AiCar(new Car()));
        Car.run();
    }

效果如下: