Factory Method Design Pattern
It is a creational design pattern. In the factory method pattern, usually, parameters are passed to get the object. This method mainly focuses on getting the object instead of the procedure for creating the object. That means the object creation will be hidden from the user. The factory method design pattern lets to subclass to get an object it wants.
Example
Think, If you want to see a description of the mobile operating system. Then you need to create the object to get details about the operating system. The main code will be polluted if you add a new OS or want to change the object creation steps. Using the factory method, object creation can be separated into another class. So updating the application will be easy, and the factory method will not pollute the main code base.
01- Create an interface for Operating systems.
02- Implements Android class with Operating System interface
03- Implements Windows class with Operating System interface
04- Creating the factory method class to get the operating system instance.
05- Main method
06- Compiled results
