builder vs factory

1. What is the difference between builder and factory pattern?
2. When would you use a factory?
3. What is the difference between the factory method and a simple factory?
4. What is factory design?
5. What is difference between factory pattern and abstract factory pattern?
6. What is a builder pattern in Java?
7. Why is factory pattern bad?
8. What's the point of factory pattern?
9. What problem does factory pattern solve?
10. What is factory design pattern in C++?

What is the difference between builder and factory pattern?

The main difference between them is that the Builder pattern primarily describes the creation of complex objects step by step. In the Abstract Factory pattern, the emphasis is on families of objects-products. Builder returns the product in the last step.

When would you use a factory?

The Factory Method pattern is generally used in the following situations:

• A class cannot anticipate the type of objects it needs to create beforehand.
• A class requires its subclasses to specify the objects it creates.
• You want to localize the logic to instantiate a complex object.

What is the difference between the factory method and a simple factory?

Use the Factory method when you want to make a Framework where you want to take a control from the creation of the Object to the management of that Object. That's unlike the Simple factory, where you only care about the creation of a product, not how to create and manage it.

What is factory design?

Factory pattern is one of the most used design patterns in Java. ... In Factory pattern, we create object without exposing the creation logic to the client and refer to newly created object using a common interface.

What is difference between factory pattern and abstract factory pattern?

The main difference between a “factory method” and an “abstract factory” is that the factory method is a single method, and an abstract factory is an object. The factory method is just a method, it can be overridden in a subclass, whereas the abstract factory is an object that has multiple factory methods on it.

What is a builder pattern in Java?

The builder pattern is a design pattern that allows for the step-by-step creation of complex objects using the correct sequence of actions. ... The construction is controlled by a director object that only needs to know the type of object it is to create.

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.

What's the point of factory pattern?

The Factory Method design pattern is used by first defining a separate operation, a factory method, for creating an object, and then using this factory method by calling it to create the object. This enables writing of subclasses that decide how a parent object is created and what type of objects the parent contains.

What problem does factory pattern solve?

There might be scenarios where object creation is scattered and repetitive in various parts of the code. The Factory pattern resolves these issues by defining an interface which specifically creates the object but gives the flexibility to the implementation classes to decide on which class to instantiate.

What is factory design pattern in C++?

Factory Method in C++

Factory method is a creational design pattern which solves the problem of creating product objects without specifying their concrete classes. Factory Method defines a method, which should be used for creating objects instead of direct constructor call ( new operator).