Explain Records in Java 15

In Java 15, Records were introduced as a new feature to simplify the creation of data-carrying classes. A Record in Java is a special kind of class that is intended to be a simple data holder. Unlike traditional classes, Records automatically provide implementations for commonly used methods like equals(), hashCode(), and toString(), making them ideal for data modeling without boilerplate code.

This feature is perfect for applications that require immutable data structures, promoting better code practices and reducing errors associated with mutable states.

A Record is defined using the `record` keyword and can hold a fixed number of attributes. These attributes are finalized at the time of creation, and their values can be accessed via accessor methods automatically generated by the compiler.

Here's an example of how to define and use a Record in Java 15:

public record Person(String name, int age) { } public class Main { public static void main(String[] args) { Person person = new Person("Alice", 30); System.out.println(person); } }

Java Records Java 15 Data Classes Data Modeling Immutable Data Structures

Related Questions

How do I avoid rehashing overhead with std::set in multithreaded code?

How do I find elements with custom comparators with std::set for embedded targets?

How do I erase elements while iterating with std::set for embedded targets?

How do I provide stable iteration order with std::unordered_map for large datasets?

How do I reserve capacity ahead of time with std::unordered_map for large datasets?

How do I erase elements while iterating with std::unordered_map in multithreaded code?

How do I provide stable iteration order with std::map for embedded targets?

How do I provide stable iteration order with std::map in multithreaded code?

How do I avoid rehashing overhead with std::map in performance-sensitive code?

How do I merge two containers efficiently with std::map for embedded targets?