In which classes is it permissible to override the componentN() method when implementing components?

The componentN() method in Kotlin is automatically generated for data classes and is used for destructuring objects. In Android (and Kotlin in general), overriding componentN() makes sense only in classes that implement the ComponentN interface or in data classes if you want to change the standard destructuring behavior.

That is:

• Data classes: here, componentN() is generated automatically, but it can be overridden for custom behavior.
• Classes implementing interfaces with componentN(): for example, if you create your own component with destructuring.

In regular classes without the need for destructuring, overriding componentN() is not necessary and not customary.

Example of overriding in a data class:

data class User(val name: String, val age: Int) {
    operator fun component1() = name.toUpperCase() // changing behavior
    // component2() will be generated automatically
}

Thus, overriding componentN() is permissible and makes sense in data classes or classes where custom destructuring is required.