Detailed explanation of factory pattern example of Java design pattern

This paper illustrates the factory pattern of Java design pattern. Share with you for your reference, as follows:

Factory mode

It involves four roles: Abstract Factory role, specific factory role, abstract product role and specific product role.

Abstract factory class roles use interfaces or parent classes to describe factory behavior,

The specific factory class role is responsible for creating a certain type of product object.

Abstract product classes can use interfaces or parent classes to describe the behavior characteristics of product objects.

A specific product class is a specific object.

The factory mode is different from the static factory mode:

The factory pattern also implements polymorphism in factory classes, not just on product objects. It can deal with different types of products, corresponding to a specific factory.

Its design mode is as follows:

Abstract factory class ifactory

Specific factory class carfactory computerfactory

Abstract product class iproduct

Specific product category car computer

Test:

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