[SOLVED] Java Records vs Kotlin Data Classes

Java Records vs Kotlin Data Classes

Java 14 offers a new feature called records, helping to create JavaBeans. What is the difference between Kotlin's data classes and Java records?

Solution

In summary:

Similarities

generated methods: equals, hashCode, toString
generated constructor
generated getters (but Kotlin getter is called o.name, while Java uses o.name())
can modify the canonical constructor
can add additional methods

Kotlin's data classes support many other little things:

data class (Kotlin)	record (Java)
`copy` method for easier object creation	no `copy` method
variables can be `var` or `val`	variables can only be `final`
can inherit from other non-data classes	no inheritance
can define non-constructor mutable variables	can define only static variables

Both are great for reducing the code bloat.