设计模式笔记---简单工厂

package cn.demail;
public class FactoryDome {
public static void main(String[] args) {
//通过工厂类获得对象并调用action()
AnimalFactory.createAnimal(AnimalFactory.CAT).action();
AnimalFactory.createAnimal(AnimalFactory.DOG).action();
}
}
abstract class Animal{//抽象动物类
private String name;
private String type;
abstract public void action();
public void whatYouAre(){
System.out.println(toString());
}
public String toString() {
return "Animal [name=" + name + ", type=" + type + "]";
}
}
class Dog extends Animal{//狗类
public void action() {
System.out.println("dog会咬人");
}
}
class Cat extends Animal{//猫类
public void action() {
System.err.println("cat会吃老鼠");
}
}
class AnimalFactory{//动物工厂类
static final int CAT=1;
static final int DOG=2;
static public Animal createAnimal(int flag){//根据参数返回对象
Animal animal=null;
switch(flag){
case CAT:
animal=new Cat();
break;
case DOG:
animal=new Dog();
break;
}
return animal;
}
}