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DS09_Decorator.java
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66 lines (49 loc) · 1.38 KB
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//Component定义一个对象接口，可以给这些对象动态地添加职责。
interface Person {
void eat();
}
//ConcreteComponent 定义一个对象，可以给这个对象添加一些职责。
class Man implements Person {
public void eat() {
System.out.println("男人在吃");
}
}
//Decorator 维持一个执行Component对象的指针，并定义一个与Componect 接口一致的接口。
abstract class Decorator implements Person {
protected Person person;
public void setPerson(Person person) {
this.person = person;
}
public void eat() {
person.eat();
}
}
//ConcreteDectrator 想组建添加职责
class ManDecoratorA extends Decorator {
public void eat() {
super.eat();
reEat();
System.out.println("ManDecoratorA类");
}
public void reEat() {
System.out.println("再吃一顿饭");
}
}
class ManDecoratorB extends Decorator {
public void eat() {
super.eat();
System.out.println("===============");
System.out.println("ManDecoratorB类");
}
}
public class DS09_Decorator{
public static void main(String[] args) {
Man man = new Man();
ManDecoratorA md1 = new ManDecoratorA();
ManDecoratorB md2 = new ManDecoratorB();
md1.setPerson(man);
md1.eat();
md2.setPerson(md1);
md2.eat();
}
}