Records in Java
Java records explained: concise immutable data carriers with generated constructors, accessors, equals, hashCode and toString, compact constructors for validation, adding methods, static factories, records with generics and interfaces, pattern matching and record patterns, and where records fit with JPA, Jackson and Spring.
CodexBash, , 5 min read
For years, a simple Java class holding a few values needed dozens of lines: private final fields, a constructor, getters, equals, hashCode and toString, all written by hand or generated by an IDE or Lombok, and all needing updates when a field changed. Records, standard since Java 16, replace that with a single line. They are ideal for DTOs, API requests and responses, values returned from methods, map keys and events. This article explains what records give you, how to customise them, and where they fit in real applications.
Sign in to read the rest
The whole 5 minute article is free with an account, along with every problem, lesson and tutorial. No card.