What is factory method in Java?

What is factory method in Java?

Factory method is a creational design pattern which solves the problem of creating product objects without specifying their concrete classes. Factory Method defines a method, which should be used for creating objects instead of direct constructor call ( new operator).

What is a concrete creator?

Concrete Creator – implements or overrides the factory method to return a Concrete Product.

What is the difference between abstract factory and factory method design 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 pattern uses inheritance and relies on a subclass to handle the desired object instantiation.

What are the advantages of factory method?

Advantage of Factory Design Pattern Factory Method Pattern allows the sub-classes to choose the type of objects to create. It promotes the loose-coupling by eliminating the need to bind application-specific classes into the code.

What is the use of factory method?

The Factory Method pattern is a design pattern used to define a runtime interface for creating an object. It’s called a factory because it creates various types of objects without necessarily knowing what kind of object it creates or how to create it.

How do you create a factory method?

Design Pattern – Factory Pattern

  1. Implementation.
  2. Create an interface.
  3. Create concrete classes implementing the same interface.
  4. Create a Factory to generate object of concrete class based on given information.
  5. Use the Factory to get object of concrete class by passing an information such as type.
  6. Verify the output.

What is a factory in coding?

In object-oriented programming (OOP), a factory is an object for creating other objects – formally a factory is a function or method that returns objects of a varying prototype or class from some method call, which is assumed to be “new”.

What are creator methods?

A creator is a method that creates (and returns) an object. That function could use a new-expression, thus creating an object, and return it. Note that a constructor is not a creator. Evaluation of a new- expression creates an object; all a constructor does is initialize fields.

What is the difference between simple factory and factory method?

– A Simple factory is normally called by the client via a static method, and returns one of several objects that all inherit/implement the same parent. – The Factory Method design is really all about a “create” method that is implemented by sub classes. It normally uses the Factory Method to create the objects.

What is a facade programming?

From Wikipedia, the free encyclopedia. The facade pattern (also spelled façade) is a software-design pattern commonly used in object-oriented programming. Analogous to a facade in architecture, a facade is an object that serves as a front-facing interface masking more complex underlying or structural code.