Builder Pattern In Java Explained!

Creating complex objects in Java with the Builder pattern

Suraj Mishra

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3 min read

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Oct 31, 2022

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Originally Published in https://asyncq.com/

Introduction

• In this article we will cover about Builder design pattern which helps us building complex objects.
• Builder design pattern is a creational design pattern type that focuses on creating an Instance.
• Lets quickly visit an example that explains about creating Instances with Builder pattern

Use Case

• Consider a case where we have Message POJO that needs to be published to Message queue.
• Typically these message has mandatory data , some optional data / metadata etc.
• For example in some cases token and clientId might be empty while in some cases these will be required.

• Then how can design object creation project such that we can make a certain field mandatory while others and optional.

Creating Constructor

• One of the ways to achieve object creation is by creating…