Contents
Is factory a pattern?
Factory method design pattern in Java. It is a creational design pattern which talks about the creation of an object. 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.
When should I use Factory pattern?
The Factory Method pattern is generally used in the following situations:
- A class cannot anticipate the type of objects it needs to create beforehand.
- A class requires its subclasses to specify the objects it creates.
- You want to localize the logic to instantiate a complex object.
What is difference between Factory pattern and abstract factory pattern?
The main difference between a “factory method” and an “abstract factory” is that the factory method is a single method, and an abstract factory is an object. The factory method is just a method, it can be overridden in a subclass, whereas the abstract factory is an object that has multiple factory methods on it.
Why to use factory pattern?
The main reason for which the factory pattern is used is that it introduces a separation between the application and a family of classes (it introduces weak coupling instead
When to use factory pattern?
Factory method pattern can be used when there is a need to generate objects that belong to specific family. Along side this requirement, you also want to keep the decisions made regarding object instantiation in one place.
What is the difference between factory and strategy patterns?
Both patterns use “new” keyword to return an object (factory) or return and algorithm (strategy). Conceptually it seems different, factory is used for differed instantiation of similar group of classes. where as Strategy is used for switching between algorithms. But when i see their examples together, they look quite similar.
What is factory method?
Factory method is a creational design pattern which solves the problem of creating product objects without specifying their concrete classes.