本文对工厂方法模式(Factory Method Pattern)的概念及其设计结构图简单地进行了描述,同样也以一个计算器的实例进行了说明,工厂方法模式较简单工厂模式,修改时关闭的,扩展时开放的,完全符合开放-封闭原则.
一、工厂方法模式简介(Brief Introduction)工厂方法模式(Factory Method Pattern),定义一个用于创建对象的接口,让子类决定实例化哪一个类,工厂方法使一个类的实例化延迟到其子类中。二、解决的问题(What To Solve) 工厂方法模式较简单工厂模式,修改时关闭
如果等级结构中只有一个具体工厂类的话,抽象工厂就可以省略,发生了退化。 六、 Factory Method模式与其它模式的关系 与工厂方法模式有关的模式还包括: 模板方法模式、MVC模式、享元模式、备忘录模式 七、 另外一个例子 //Factory Method pattern -- Real World example usingSystem; usingSystem.Collections; //"Pr...
The Factory method works just the same way: it defines an interface for creating an object, but leaves the choice of its type to the subclasses, creation being deferred at run-time. A simple real life example of the Factory Method is the hotel. When staying in a hotel you first have to...
https://github.com/coder-pig/DesignPatternsExample/tree/master/4.Factory%20Method%20Pattern 附:简单工厂模式又叫静态工厂模式! 另外,本系列只是快速过一过设计模式,主要的念想是先掌握怎么用,会写, 对于具体何时用,还需通过项目积累相关经验!优缺点摘自网络,不用过于 ...
Example Let us consider an application that draws different geometric shapes on the basis of clients' demand. The class diagram of the application is as shown below: Figure: Factory Method Pattern Example TheShapeFactoryclass has a static methodgetShape(), which returns theGeometricShapeobject on ...
Simple Factory:Strictly speaking, it’s not a design pattern, but a technique we use very often. It encapsulates the object instantiation process. Factory Method:Defines an interface for creating an object, but let’s the classes that implement the interface decide which class to instantiate. The...
Template Method模式 1. The article analysised a class of scenes which is on the contrary of the scenes oftemplate method pattern,and made a pattern named symmetrical pattern. 分析了一类和Template Method模式应用场景相反的场景,提出了对称模式。
ExampleThe Factory Method defines an interface for creating objects, but lets subclasses decide which classes to instantiate. Injection molding presses demonstrate this pattern. Manufacturers of plastic toys process plastic molding powder, and inject the plastic into molds of the desired shapes. The ...
method(); } 结果 工厂类三的实现--- ConcreteProductA 总结 工厂模式是一个很好的模式,有优点也有缺点,在我们使用的过程中,应该根据自己的需求选择相应的模式。 java-example/src/main/java/com/example/pattern/factory at pattern · wdmxzf/java-examplegithub.com/wdmxzf/java-example/tree/pattern/...