工厂方法 VS 工厂对象
据我了解，工厂方法是简单工厂，工厂对象是抽象工厂？ 并且：
-工厂方法（简单工厂）：
public class SimplePizzaFactory {
public static final int CHEESE = 1;
public static final int PEPPERONI = 2;
public static final int VEGGIE = 3;
public static Pizza createPizza(int type) {
Pizza pizza = null;
if (type == CHEESE) {
pizza = new CheesePizza();
} else if (type == PEPPERONI ) {
pizza = new PepperoniPizza();
} else if (type == VEGGIE ) {
pizza = new VeggiePizza();
}
return pizza;
}
}
工厂对象（抽象工厂）
：？
我说得对吗？
工厂模式有多少种实现，它们有什么区别？
As I understand Factory Method is Simple Factory and Factory Object is Abstract Factory?
And:
-Factory Method (Simple Factory):
public class SimplePizzaFactory {
public static final int CHEESE = 1;
public static final int PEPPERONI = 2;
public static final int VEGGIE = 3;
public static Pizza createPizza(int type) {
Pizza pizza = null;
if (type == CHEESE) {
pizza = new CheesePizza();
} else if (type == PEPPERONI ) {
pizza = new PepperoniPizza();
} else if (type == VEGGIE ) {
pizza = new VeggiePizza();
}
return pizza;
}
}
Factory Object(Abstract Factory):
?
Am I right?
How much are there realizations of Factory patterns and what is their difference?
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不。工厂方法是不需要任何状态的工厂。工厂类本身就是一个类 - 它具有状态以及改变该状态的方法。最后，您调用
.create()方法，它使用其当前状态创建不同类型的新对象。抽象工厂是另一回事——同一个抽象概念有多个工厂实现。 wikipedia 示例 是关于 e
GUIFactory- 这是一个抽象工厂，它有两个实现：WinFactory和OSXFactory。客户端代码不知道它正在使用哪个实现 - 它只知道工厂创建Button实例。这使得无论操作系统如何都可以编写相同的代码。No. A factory-method is a factory that does not require any state. A factory class is a class itself - it has state, and methods that alter that state. In the end you call the
.create()method, and it uses its current state to create a new object of a different type.Abstract factory is a different thing - there you have multiple factory implementations of the same abstract concept. The wikipedia example is about e
GUIFactory- this is an abstract factory, which has two implementations:WinFactoryandOSXFactory. The client code does not know which implementation it is using - it just knows the factory createsButtoninstances. Which make it possible to write the same code regardless of the OS.