Java設計模式——裝飾模式

轉載自：http://blog.csdn.net/xu__cg/article/details/53024490

抽象構件

public interface CarInterface {
    void move();
}

具體構建

public class Car implements CarInterface {
    public void move() {
        System.out.println("路上行駛");
    }
}

裝飾角色

public class SuperCar implements CarInterface {
    protected CarInterface car;

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

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

具體裝飾角色

/**
 * 飛行汽車
 */
public class FlyCar extends SuperCar {
    public FlyCar(CarInterface car) {
        super(car);
    }

    public void fly() {
        System.out.println("空中行駛汽車");
    }

    @Override
    public void move() {
        super.move();
        fly();
    }
}

/**
 * 水上汽車
 */
public class WaterCar extends SuperCar {
    public WaterCar(CarInterface car) {
        super(car);
    }

    public void swim() {
        System.out.println("水上行駛汽車");
    }

    @Override
    public void move() {
        super.move();
        swim();
    }
}

客戶端

public class Client {
    public static void main(String[] args) {
        System.out.println("------普通汽車，正常行駛-----");
        Car car = new Car();
        car.move();

        System.out.println("------增長新功能,飛行------");
        FlyCar flyCar = new FlyCar(car);
        flyCar.move();

        System.out.println("------新增長功能，水上行駛-----");
        WaterCar waterCar = new WaterCar(car);
        waterCar.move();

        System.out.println("-----新增長兩個功能，飛行與水上行駛-----");
        WaterCar waterCar2 = new WaterCar(flyCar);
        waterCar2.move();
    }
}