class Decorator{

    public void eat(){

        System.out.println("吃饭");

    }

}

public class DecoratorDemo extends Decorator{

    public DecoratorDemo() {

    }

    public DecoratorDemo(Decorator d) {

    }

    /**

     * @param args

     */

    public static void main(String[] args) {

        //使用继承来增强功能,体系会很臃肿

        Decorator dd=new DecoratorDemo();

        dd.eat();//输出 孩子吃饭

        //使用装饰器模式增强功能，增强某一个功能

        //构造参数传递

        DecoratorDemo dd2=new DecoratorDemo(new Decorator());

        dd2.eatFoods();

    }

    public void eat(){

        System.out.println("孩子吃饭");

    }

    public void eatFoods(){

        System.out.println("孩子吃饭");

    }

}