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Kotlin lessons (25/33)

Kotlin — Data Classes

Basic data class

data class User(val name: String, val age: Int)

val user = User("Alice", 25)

Auto-generated methods

val user2 = User("Alice", 25)
println(user == user2)  // true (equals)
println(user.toString())  // User(name=Alice, age=25)

Copy

val user3 = user.copy(age = 30)

Destructuring

val (name, age) = user

Mini Practice

  1. Create data class
  2. Use equals/toString
  3. Copy with changes
  4. Destructure objects

Up Next

Continue with Exceptions - Exception handling.

Related Topics

InterfacesSealed ClassesObjectsNull Safety

Frequently Asked Questions about Data Classes

What is Data Classes in Kotlin?

Data Classes is a fundamental concept in Kotlin. This lesson explains it step by step with clear examples, making it easy for beginners to understand.

How do I learn Data Classes?

Start by reading the explanation above, then try the code examples. Practice by modifying the examples and experimenting with different values. Hands-on practice is the best way to learn Data Classes.

Why is Data Classes important in Kotlin?

Data Classes is essential for Kotlin development. Understanding this concept will help you write better code and solve real-world problems more effectively.