JuniorTheoryCommon

What does the program print (lines separated by spaces)?

KOTLIN

fun main() {
    try {
        println("a")
        "x".toInt()
        println("b")
    } catch (e: NumberFormatException) {
        println("c")
    } finally {
        println("d")
    }
}

a c d

Expecting a b c d: thinking the rest of try still runs after the throw. An exception jumps straight to the matching catch, so b is never printed.
Expecting a c: thinking finally runs only when nothing went wrong. It runs in every case, after try or after catch, so d is printed too.

What does the program print if the text "x" is replaced with "7"?
What happens if the catch names IllegalStateException instead?

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JuniorTheoryCommon

What does the program print (lines separated by spaces)?

KOTLIN

fun main() {
    try {
        println("a")
        "x".toInt()
        println("b")
    } catch (e: NumberFormatException) {
        println("c")
    } finally {
        println("d")
    }
}

a c d

Expecting a b c d: thinking the rest of try still runs after the throw. An exception jumps straight to the matching catch, so b is never printed.
Expecting a c: thinking finally runs only when nothing went wrong. It runs in every case, after try or after catch, so d is printed too.

What does the program print if the text "x" is replaced with "7"?
What happens if the catch names IllegalStateException instead?

Back to questions Open topic in roadmap →Answer it yourself — Quiz