[javaSE] IO流（装饰设计模式）

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");
}
}