Modern Java Records (Java 14+) for Immutable Data Modeling

Intermediate13 min read•Updated: 2026-10-22

📋 Modern Java Records (Java 14+) for Immutable Data Modeling

Introduction

Before Java 14, creating a simple Data Transfer Object (DTO) required 50 lines of boilerplate: private fields, constructors, getters, toString(), equals(), and hashCode(). Java Records eliminate this ceremony with a single concise line of code!

⚡ The Power of Records

A record automatically generates:

Private final fields.
Public canonical constructor.
Public accessor methods (named name(), rollNumber(), without the "get" prefix).
Semantic equals(), hashCode(), and toString().

1// One line defines an immutable data model!
2public record StudentDTO(int rollNumber, String fullName, double gpa) {}
3 
4public class RecordDemo {
5    public static void main(String[] args) {
6        StudentDTO student = new StudentDTO(101, "Aarav Sharma", 9.4);
7 
8        // Accessors:
9        System.out.println("Name: " + student.fullName());
10        System.out.println("Roll: " + student.rollNumber());
11 
12        // Automatic readable toString():
13        System.out.println(student); // StudentDTO[rollNumber=101, fullName=Aarav Sharma, gpa=9.4]
14 
15        // Automatic value equality:
16        StudentDTO clone = new StudentDTO(101, "Aarav Sharma", 9.4);
17        System.out.println("Equal? " + student.equals(clone)); // true!
18    }
19}

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Exception Hierarchy: Throwable, Exception, RuntimeException, and Error

Modern Java Records (Java 14+) for Immutable Data Modeling

Intermediate13 min read•Updated: 2026-10-22

Study Materials

📋 Modern Java Records (Java 14+) for Immutable Data Modeling

Introduction

⚡ The Power of Records

A record automatically generates:

Private final fields.
Public canonical constructor.
Public accessor methods (named name(), rollNumber(), without the "get" prefix).
Semantic equals(), hashCode(), and toString().

1// One line defines an immutable data model!
2public record StudentDTO(int rollNumber, String fullName, double gpa) {}
3 
4public class RecordDemo {
5    public static void main(String[] args) {
6        StudentDTO student = new StudentDTO(101, "Aarav Sharma", 9.4);
7 
8        // Accessors:
9        System.out.println("Name: " + student.fullName());
10        System.out.println("Roll: " + student.rollNumber());
11 
12        // Automatic readable toString():
13        System.out.println(student); // StudentDTO[rollNumber=101, fullName=Aarav Sharma, gpa=9.4]
14 
15        // Automatic value equality:
16        StudentDTO clone = new StudentDTO(101, "Aarav Sharma", 9.4);
17        System.out.println("Equal? " + student.equals(clone)); // true!
18    }
19}

Next Lesson

Exception Hierarchy: Throwable, Exception, RuntimeException, and Error

Continue learning with hands-on practice, examples, and exercises in the upcoming topic.

Related Lessons

Previous Lesson	Next Lesson
Java Enums: Defining Enum Types with Custom Fields and Methods	Exception Hierarchy: Throwable, Exception, RuntimeException, and Error

Practice Quiz

Test your understanding of this lesson with 1 questions. Each question has one correct answer.

Previous Next