Kotlin 'when' statement vs Java 'switch'

Question

Pattern matching in Kotlin is nice and the fact it does not execute the next pattern match is good in 90% of use cases.

In Android, when database is updated, we use J

Answer 1

Another variation of OP's answer:

override fun onUpgrade(db: SQLiteDatabase, oldVersion: Int, newVersion: Int) {
    when (oldVersion) {
        newVersion -> return
        1 -> TODO("upgrade from v1 to v2")
        2 -> TODO("upgrade from v2 to v3")
    }
    oldVersion++
    onUpgrade(db, oldVersion, newVersion)
}