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How does factory pattern work in Java?
The Factory Design Pattern or Factory Method Design Pattern is one of the most used design patterns in Java. According to GoF, this pattern “defines an interface for creating an object, but let subclasses decide which class to instantiate. The Factory method lets a class defer instantiation to subclasses”.
What is the Factory method patterns explain with examples?
Example. The Factory Method defines an interface for creating objects, but lets subclasses decide which classes to instantiate. Injection molding presses demonstrate this pattern. Manufacturers of plastic toys process plastic molding powder, and inject the plastic into molds of the desired shapes.
Where is factory design pattern used in Java?
Factory design pattern is used to create objects or Class in Java and it provides loose coupling and high cohesion. Factory pattern encapsulate object creation logic which makes it easy to change it later when you change how object gets created or you can even introduce new object with just change in one class.
What is Factory method in design patterns?
Factory Method is a creational design pattern that provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.
Why is Factory pattern bad?
That’s just a bad habit. The Factory Method is a design pattern that relies on inheritance. If you make it static , you can no longer extend it in subclasses, which defeats the purpose of the pattern. When a static creation method returns new objects it becomes an alternative constructor.
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 factory method design pattern implementation in Java?
The Factory Method Pattern is one of several Creational Design Patterns we often use in Java. Their purpose is to make the process of creating objects simpler, more modular, and more scalable. These patterns control the way we define and design the objects, as well as how we instantiate them.
What is factory method?
Factory method is a creational design pattern which solves the problem of creating product objects without specifying their concrete classes.
What is factory method design pattern?
Factory Design Pattern. Factory method is a creational pattern used for creating objects.Instead of directly creating class objects by using constructors clients uses the the Factory method to create objects.The client is not aware of the specific class object which it creates by calling the Factory method.