设计模式--装饰模式

package com.offcn.designpattern.decoratorpattern;

public class DecoratorpatternDemo {
    public static void main(String[] args) {
        MyCar myCar = new MyCar();
        myCar.move();
        System.out.println("增加新的功能，飞行------------");
        FlyCar flyCar = new FlyCar(myCar);
        flyCar.move();
        System.out.println("再增加一个功能，水里游--------------");
        WaterCar waterCar = new WaterCar(new FlyCar(myCar));
        waterCar.move();
    }
}
//Component抽象构建角色
interface Car{
    void move();
}
//ConcreteComponent具体构建角色（真实对象）
class MyCar implements Car{

    @Override
    public void move() {
        System.out.println("我的车可以在地上跑");
    }
}
//Decorator装饰角色
class SuperCar implements Car{
    protected Car car;
    public SuperCar(Car car){
        super();
        this.car = car;
    }

    @Override
    public void move() {
        car.move();
    }
}
//ConcreteDecorator具体装饰角色
class FlyCar extends SuperCar{
    public FlyCar(Car car) {
        super(car);
    }
    public void fly() {
        System.out.println("现在可以在天上飞");
    }
    @Override
    public void move() {
        super.move();
        fly();
    }
}
//ConcreteDecorator具体装饰角色
class WaterCar extends SuperCar{
    public WaterCar(Car car) {//参数传FlyCar flyCar,super(flyCar)
        super(car);
    }
    public void swim() {
        System.out.println("现在可以在水里游");
    }
    @Override
    public void move() {
        super.move();//flyCar.move()
        swim();
    }
}