Java设计模式之装饰者模式

package demo2;

public interface Car {
    public abstract void run();

    public abstract void stop();
}

package demo2;

public class QQ implements Car {
    @Override
    public void run() {
        System.out.println("QQ能跑60迈！");
    }

    @Override
    public void stop() {
        System.out.println("QQ刹车....停住");
    }
}

package demo2;

public class CarWrapper implements Car {

    private  Car car;

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

    @Override
    public void run() {
        System.out.println( "增强后，超过100迈。");
    }

    @Override
    public void stop() {
        car.stop();
    }
}

package demo2;

public class WapperTest {
    /**
     * 装饰者模式前提条件：
     * 1.被增强类和增强类必须实现同一个接口
     * 2.增强类要有引用指向被增强类
     * @param args
     */
    public static void main(String[] args) {
        Car car = new CarWrapper(new QQ());
        car.run();
        car.stop();
    }
}