Design Pattern: Builder Variants

A comprehensive collection of Builder pattern implementations in Java, demonstrating different approaches and trade-offs.

📋 Overview

This repository contains multiple implementations of the Builder pattern, each with unique characteristics and use cases.

🏗️ Builder Variants

1. Classic Builder (PersonClassicBuilder)

Standard Java Builder pattern with universal entry point

PersonClassicBuilder person = PersonClassicBuilder.builder().name("John").age(25).build();

Features:

✅ Universal .builder() static method

✅ Supports optional parameters

✅ Standard Java idiom

✅ Most flexible approach

2. Fluent Builder (PersonFluentBuilder)

Staged builder with mandatory field initialization

PersonFluentBuilder person = PersonFluentBuilder.name("John").age(25).build();

Features:

✅ Fluent interface starting with mandatory fields

✅ Staged construction

✅ Clear required/optional field distinction

✅ Natural reading order

3. Buildless Builder (PersonBuildlessBuilder)

Builder without terminal build() method

PersonBuildlessBuilder person = PersonBuildlessBuilder.name("John").age(25);

Features:

✅ No .build() method required

✅ Direct object return

✅ All fields are mandatory

✅ Most concise syntax

Use Cases

Choose Classic Builder when:

You need maximum flexibility

Supporting optional parameters

Following standard Java conventions

Complex object construction

Choose Fluent Builder when:

You have clear mandatory/optional field separation

Want guided construction process

Prefer natural language flow

Choose Buildless Builder when:

All fields are required

You want the most concise syntax

Working with value objects

Performance is critical