5ce932ceb7
- properly categorize all patterns - remove pattern list from readme - minor fixes to readme - removed "introduction" because its not a pattern and an error i committed some time ago
21 lines
708 B
Markdown
21 lines
708 B
Markdown
---
|
|
layout: pattern
|
|
title: Factory Method
|
|
folder: factory-method
|
|
permalink: /patterns/factory-method/
|
|
categories: Creational
|
|
tags: Java
|
|
---
|
|
|
|
**Intent:** Define an interface for creating an object, but let subclasses
|
|
decide which class to instantiate. Factory Method lets a class defer
|
|
instantiation to subclasses.
|
|
|
|
|
|
|
|
**Applicability:** Use the Factory Method pattern when
|
|
|
|
* a class can't anticipate the class of objects it must create
|
|
* a class wants its subclasses to specify the objects it creates
|
|
* classes delegate responsibility to one of several helper subclasses, and you want to localize the knowledge of which helper subclass is the delegate
|