To do so without modifying existing source code, we need to implements Simple Factory pattern, in which a static method can be invoked to create connection to a given database. Design patterns Simple factory (Java) Example. https://www.tutorialspoint.com/design_pattern/factory_pattern.htm A factory decreases coupling between code that needs to create objects from object creation code. Check out the full list of covered patterns there. I'd advise you to at least change this code so the method's argument is a simple class name, not a fully qualified name: ... Browse other questions tagged java reflection factory factory-pattern or ask your own question. This class has a static method called getAnimalFromEnum that will instantiate an Animal sub type. Simple Factory: Strictly speaking, it’s not a design pattern, but a technique we use very often.It encapsulates the object instantiation process. In other words, subclasses are responsible to create the instance of the class. creational-pattern . In the above example, it’s being created a simple Java factory pattern class called FactoryPatternClass. Why is the Simple Factory a Pseudopattern? This is the simpler way of creating objects using a Java factory. It’s still not The Factory Method Patterns yet. A Factory Pattern or Factory Method Pattern says that just define an interface or abstract class for creating an object but let the subclasses decide which class to instantiate. Factory Method: Defines an interface for creating an object, but let’s the classes that implement the interface decide which class to instantiate.The Factory method lets a class defer instantiation to subclasses. 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. Wikipedia says. Factory Method Pattern. Most of the tutorials people teach Simple Factory pattern as Factory method patterns. This is called The Simple Factory method. This post is part of the Design Patterns in Java Series. Since more actions will be added later, I decided to use create a ServiceFactory using the Factory Method pattern and use the Template pattern on the services to avoid code duplication. First of all, as I mentioned in the article on the factory method pattern, I use the prefix pseudo because the simple factory isn’t actually considered a pattern in the Gang of Four book. In this chapter we will look into the Simple Factory Pattern(or an Idiom?). The Factory Method Pattern is also known as Virtual Constructor. But we have to improve this Simple Factory pattern in order to fully encapsulated the object generation part so then we call it Factory Method Pattern. A simple Java example is the following one: How to create a Simple Factory Pattern with autowired beans in Spring? 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