# Best Feature # Java 17 Feature Highlight: Record Class (with Example) While working on backend development, I explored Record classes in Java 17 — a powerful way to reduce boilerplate code. 🔹 Why use Records? ✔ Less code (no getters, constructors, toString needed) ✔ Immutable by default ✔ Ideal for DTOs & API responses 🔹 Traditional Way: class User { private String name; private int age; public User(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public int getAge() { return age; } } -------------------------------------------------------------------------- 🔹 Using Record (Java 17): record User(String name, int age) {} 1. Same functionality with minimal code! 2. Records help write cleaner, more maintainable applications by focusing on data rather than boilerplate. Excited to explore more modern Java features #Java #Java17 #BackendDevelopment #CleanCode #SpringBoot #DeveloperJourney #SoftwareEngineering
Records are one of those features that seems small but changes how you think about DTOs entirely. We switched all our API response objects to records and the codebase got so much cleaner. One thing worth knowing is that records work great with Jackson serialization out of the box since Spring Boot 3.x. No extra config needed. The only gotcha I've hit is that you can't extend records since they're implicitly final, so if you have a base DTO that multiple responses inherit from, you'll need to rethink that hierarchy. Composition over inheritance works better with records anyway.
records are great for DTOs and we use them heavily now. one thing worth knowing though - records work beautifully with Spring Boot request/response bodies since Jackson handles them natively in newer versions. the compact constructor is also super useful for validation, like record User(String name, int age) { User { if(age < 0) throw new IllegalArgumentException(); } } - keeps validation right next to the data definition. only gotcha is they dont play well with JPA entities since they need mutable fields and a no-arg constructor