dart (flutter) - 예외.

test() {
  try {
    throw OutOfLlamasException('Expected at least 1 section');
    throw 'Out of llamas!';
  } on OutOfLlamasException {
    // A specific exception
    buyMoreLlamas();
  } on Exception catch (e) {
    // Anything else that is an exception
    print('Unknown exception: $e');
  } catch (e) {
    print('Error: $e'); // Handle the exception first.

  } finally {
    cleanLlamaStalls(); // Then clean up.

  }
}