sampleFactory

最新推荐文章于 2024-09-13 08:40:27 发布

宁静的飞飞

最新推荐文章于 2024-09-13 08:40:27 发布

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本文链接：https://blog.youkuaiyun.com/jixufly/article/details/5580143

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public interface Animal {
/**所有动物都会吃*/
public void eat();
}

public class Tiger implements Animal {

public void eat() {
System.out.println("老虎要吃饭！");
}

public void run() {
System.out.println("老虎要跑步！");
}
}

public class Parrot implements Animal {

public void eat() {
// TODO Auto-generated method stub
System.out.println("鹦鹉要吃饭");
}

public void fly() {
System.out.println("鹦鹉要飞翔");
}
}

public class sampleFactory {
public static int i = 0;

public static Animal createAnimal(String animalName)
throws ClassNotFoundException, InstantiationException,
IllegalAccessException {
i++;
System.out.println(i);
Class c = Class.forName(animalName);
Animal animal = (Animal) c.newInstance();
return animal;
}
}

public class Client {

/**
* @param args
* @throws IllegalAccessException
* @throws InstantiationException
* @throws ClassNotFoundException
*/
public static void main(String[] args) throws ClassNotFoundException,
InstantiationException, IllegalAccessException {
// TODO Auto-generated method stub
Animal animal = sampleFactory.createAnimal("Tiger");
animal.eat();
Tiger tiger = (Tiger) animal;

tiger.run();
animal = sampleFactory.createAnimal("Dolphin");
animal.eat();

animal = sampleFactory.createAnimal("Parrot");
animal.eat();
}

}

优点：客户端不再负责对象创建，把这个责任丢给了具体的工厂类

缺点：1、由于简单工厂使用静态方法创建对象，导致静态方法无法被继承；2、当具体产品增多时候，客户端需要不同的方式创建具体产品，需要不断修改工厂类；