Factory Pattern Java, Factory Method Pattern Wikipedia

Java apis and frameworks extensively use the factory method pattern.

Factory unlock iphone. Now that ive created my dog factory the dog interface and all of the dog sub types ill create a driver program named javafactorypatternexample to test the dog factory. Factory design pattern examples in jdk. A factory pattern or factory method pattern says that just define an interface or abstract class for creating an object but let the subclasses decide which class to instantiate.

The factory design pattern says that define an interface a java interface or an abstract class and let the subclasses decide which object to instantiate. In other words subclasses are responsible to create the instance of the class. This type of design pattern comes under creational pattern as this pattern provides one of the best ways to create an object.

Abstract factory pattern says that just define an interface or abstract class for creating families of related or dependent objects but without specifying their concrete sub classesthat means abstract factory lets a class returns a factory of classes. In my previous post singleton design pattern in java we discussed various ways to create an instance of a class such that there can not exist another instance of same class in same jvm. Factory design pattern youtube video tutorial.

After finishing this article while writing your application consider using the java factory pattern. So this is the reason that abstract factory pattern is one level higher than the factory pattern. Factory pattern factory pattern is one of the most commonly used design patterns in java.

The key advantage that you have already learned is how the factory method pattern helps encapsulate object creation code from client code. In factory pattern we create object without exposing the creation logic to the client and refer to newly created object using a common interface. In factory mode we dont expose the creation logic to the client when creating the object and we point to the newly created object by using a common interface.

Abstract factory pattern is yet another creational design pattern and is considered as another layer of abstraction over factory patternin this tutorial we will expand the scope of car factory problem discussed in factory patternwe will learn when to use factory pattern by expanding scope of car factory and then how abstract factory pattern solves the expanded scope. Abstract factory pattern. Valueof method in wrapper classes like boolean integer etc.

This driver class demonstrates how to get different types of dogs from the factory. Factory pattern provides abstraction between implementation and client classes through inheritance. Factory pattern is one of the most used design patterns in java.

The factory method in the interface lets a class defer the instantiation to one or more concrete subclasses. The java factory pattern example driver program.