How do you use a constructor in Flutter?

Factory Method lets a class defer instantiation to subclasses . … When objects are created within the class, it is very inflexible since you cannot change the instantiation of the object independently from the class — the class is committed to a particular object.18 Ara 2019

The Factory Method pattern, sometimes referred to as the Virtual Constructor pattern, provides a way to conceal an object’s creation logic from client code, but the object returned is guaranteed to adhere to a known interface .19 Nis 2021

A factory constructor is a constructor that can be used when you don’t necessarily want a constructor to create a new instance of your class . This might be useful if you hold instances of your class in memory and don’t want to create a new one each time (or if the operation of creating an instance is costly).

Design Pattern – Factory Pattern

Factory Method is referred as a creational design pattern which provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created . Also known as virtual constructors. Lets clear it with a small code.2 Haz 2021