Builder
The Builder design pattern offers a different perspective on how to create objects than the other GOF creational patterns. It mostly deals with the case when the constructor would have too many parameters and it'd, therefore, be problematic and unreliable to pass all these parameters. Builder often uses the Method Chaining pattern, but its principle lies mainly in separating the construction of an object into a separate builder object. There are multiple ways how to use Builder, we'll introduce more of them here and mention how it differs from the Factory and the Template Method patterns.
Motivation
It's easy to put a value in the wrong place when a method, most often the constructor, accepts for example 10 parameters. Parameters are separated by commas, and we don't include their names in most programming languages. That's why it often happens that we forget which is which:
Button button = new Button("Save", 100, 50, 2, Color.Blue, Icon.Disk, true, {"ctrl", "s"});
An even worse situation occurs when the method has some optional parameters and we have to find their default values to
...End of the preview...
Continue further
You've come here and that's great! We believe that the first lessons showed you something new and useful
Do you want to continue the course? Go to the premium section.
Buy this course
This article is licensed: Premium, by buying this article, you agree with the terms of use.
- Unlimited and permanent access to individual lessons.
- High quality IT knowledge.
- Skills to help you get your dream and well-paid job.
Article description
Requested article covers this content:
The Builder design pattern is often used for objects with a too complex constructor and separates the construction of the object into a separate builder.
You gain credits by supporting our network. This is done by sending a helpful amount of money to support the site, or by creating content for the network.
David learned IT at the Unicorn University - a prestigious college providing education on IT and economics.