A Comprehensive Guide on Builder Design Pattern with all Flavors & Examples
Posted by erdsingh24@reddit | programming | View on Reddit | 2 comments
Constructing complex objects with numerous optional parameters often leads to a mess of telescoping constructors or error-prone setter methods. The Builder Pattern solves this by providing a clear, step-by-step process for creating objects, resulting in code that is more readable, maintainable, and thread-safe.
This article explores the pattern through a Custom Pizza Order analogy, demonstrating both the classic approach and the modern, fluent style using modern Java 21 compatible codes.
imihnevich@reddit
It does make it better, however I still can't understand one thing. Why when we talk about the builder pattern, we don't mention that having class with so many fields that construction becomes unreadable is usually a sign of bad design?
c-digs@reddit
There's two flavors of this.
First flavor is the unavoidable kind. Something really complex to set up like a web request server. This one feels unavoidable.
Other flavor is developers cram all permutations of payloads into one model. Now you need to know which magic fields you need for which use case.
The latter is indeed bad design and often a builder is the only sane solution to fixing it if rewriting the interface would otherwise introduce regressions.