What is the feature of Data Class compared to other classes in Kotlin?

Features of Data Class in Kotlin:

• Automatic generation of equals(), hashCode(), toString(), copy(), and componentN() functions.
• Require at least one parameter in the constructor.
• All constructor parameters must be declared as val or var.
• Primarily designed for storing data.

Example:

// Regular class
class User(val name: String, val age: Int)

// Data Class
data class DataUser(val name: String, val age: Int)

fun main() {
    val user1 = User("Alice", 30)
    val user2 = User("Alice", 30)
    println(user1 == user2) // false (compares references by default)
    println(user1.toString()) // Will output something like User@hashcode

    val dataUser1 = DataUser("Alice", 30)
    val dataUser2 = DataUser("Alice", 30)
    println(dataUser1 == dataUser2) // true (compares data)
    println(dataUser1.toString()) // Will output DataUser(name=Alice, age=30)
}

Differences in generated functions:

Function	Regular class	Data Class
equals()	Compares references	Compares data by fields
hashCode()	Depends on implementation	Depends on data by fields
toString()	Class name and hash code	Class name and field values
copy()	Not available (manual implementation needed)	Available (easily creates copies)
componentN()	Not available	Available (destructures object)

Using componentN():

data class Point(val x: Int, val y: Int)

fun main() {
    val p = Point(10, 20)
    val (x, y) = p // Destructuring using component1(), component2()
    println("x: $x, y: $y") // Will output x: 10, y: 20
}