Builders, Withers, and Records - Java’s path to immutability

This article discusses the creation of objects in Java, focusing on immutable objects which are easier to maintain and safer for multithreaded applications. Two approaches to creating such objects are presented: Builders and Withers. The Builder approach involves using an inner class to build a new instance while the Wither approach creates a new instance with each property change. Both methods can be made more efficient by using libraries that generate code or reduce boilerplate. Additionally, Java 16 introduced Records, which are struct definitions focused on immutability and reducing boilerplate code. The choice between Builders and Withers depends on the specific requirements of an application, while Records are recommended for representing data with an immutable state.

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