The Factory Design Pattern is a creational design pattern used to create objects without exposing the object creation logic to the client. Instead of using the new keyword directly, the client relies on a factory method to get the required object. Factory Design pattern is used when we have a super class with multiple subclass and based on input , we return the one of the subclasses . Super class in factory pattern can be an interface , abstract class ,or a normal java class . Example : Computer.java Pc.java Server.java ComputerFactory.java TestFactoryMain.java