What is factory design in Java?

What is factory design in Java?

The factory design pattern says that define an interface ( A java interface or an abstract class) and let the subclasses decide which object to instantiate. The factory method in the interface lets a class defer the instantiation to one or more concrete subclasses.

Where is factory pattern used 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 use of factory design pattern?

The Factory Method pattern is a design pattern used to define a runtime interface for creating an object. It’s called a factory because it creates various types of objects without necessarily knowing what kind of object it creates or how to create it.

What is factory in OOP?

In object-oriented programming (OOP), a 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 from some method call, which is assumed to be “new”.

What are the types of factory pattern?

the abstract factory pattern, the static factory method, the simple factory (also called factory).

What is benefit of factory pattern?

Advantage of Factory Design Pattern Factory Method Pattern allows the sub-classes to choose the type of objects to create. It promotes the loose-coupling by eliminating the need to bind application-specific classes into the code.

Why do we use factory design pattern 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 the advantage of factory design pattern in Java?

What is factory design pattern in OOP?

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. In other words, subclasses are responsible to create the instance of the class.

What is factory used for?

A factory, manufacturing plant or a production plant is an industrial site, often a complex consisting of several buildings filled with machinery, where workers manufacture items or operate machines which process each item into another.

Which are the three types of factory method?

There are 3 types of factory design pattern.

  • Simple factory.
  • Factory method.
  • Abstract factory.

What is the benefit of factory pattern in Java?

Factory Design Pattern Advantages Factory design pattern provides approach to code for interface rather than implementation. Factory pattern removes the instantiation of actual implementation classes from client code. Factory pattern makes our code more robust, less coupled and easy to extend.

What are the design patterns used in Java?

The various subsets of Design Pattern in Java Adopter Pattern. It helps in joining to unrelated interfaces to work together with the objects. Composite Pattern. Composite patterns are one of the structural design patterns used. Proxy Pattern. It provides a placeholder or surrogate for other objects to control access to it. Flyweight Pattern. Facade Pattern. Bridge Pattern. Decorator Pattern.

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.

Why do we use design patterns in Java?

There are many java design patterns that we can use in our java based projects. Using design patterns promotes reusability that leads to more robust and highly maintainable code. It helps in reducing total cost of ownership (TCO) of the software product. Since design patterns are already defined, it makes our code easy to understand and debug.