Factory method design pattern belongs to creational patterns. This pattern is also known as virtual constructor pattern. This pattern is designed to create an object in a smart way, smart way in the sense that in general, we use new operator in Java to create an object but the new operator...
Notice that based on the input parameter, different subclass is created and returned.getComputeris the factory method. Here is a simple test client program that uses above factory design pattern implementation. package com.journaldev.design.test; import com.journaldev.design.factory.ComputerFactory; im...
package com.DesignPattern.Creational.FactoryMethod; public interface Fruit { //生长 public void grow(); //收获 public void harvest(); //栽种 public void plant(); } 详细工厂FruitAppleGardener.java package com.DesignPattern.Creational.FactoryMethod; public class FruitAppleGardener implements FruitGarde...
Other design patterns require new classes, whereas Factory Method only requires a new operation.People often use Factory Method as the standard way to create objects; but it isn't necessary if: the class that's instantiated never changes, or instantiation takes place in an operation that ...
Factory Design Pattern is one of the Creational Design pattern and it’s widely used in JDK as well as frameworks like Spring MVC and Struts. The factory
Factory Method: creation through inheritance. Prototype: creation through delegation. Virtual constructor: defer choice of object to create until run-time. classExpressionimplementsCloneable{publicStringstr;publicExpression(Stringstr) {this.str=str; }@OverridepublicExpressionclone() {Expressionclone=null;try...
Some important points about Factory Design Pattern method are; We can keep Factory class Singleton or we can keep the method that returns the subclass asstatic. Notice that based on the input parameter, different subclass is created and returned.getComputeris the factory method. ...
ConcreteCreator 重载factory method以创建某个 ConcreteProduct 的具体实例。 也就是说Creator依赖于ConcreteCreator创建Product型的ConcreteProduct对象。 Factory method使应用程序代码只需处理Product接口,而与具体的类(ConcreteProduct)无关,增强了代码可重用性,因为它独立于用户定义的具体的类。
DesignPattern_Java:Factory Method Pattern 工厂方法模式 Factory Method :(虚拟构造函数模式 Virtual Constructor,多态性工厂模式 Ploymorphic Facoty) Define an interface for creating an object,but let subclasses decide which class to instantiate.Factory Method lets a class defer instantiation to subclasses....
在Java 中应用设计模式 - Factory Method刘湛