Dart custom exception

class CustomException implements Exception {
  String errorMessage() {
    return ("Invalid Amount");
  }
}

void AmountException(int amount) {
  if (amount <= 0) {
    throw new CustomException();
  }
}

void main() {
  try {
    AmountException(0);
  } catch (e) {
    print(errorMessage());
  }
}

Source: stackoverflow.com

Dart custom exception

class CustomException implements Exception {
  String cause;
  CustomException(this.cause);
}

void main() {
  try {
    throwException();
  } on CustomException {
    print("custom exception is been obtained");
  }
}

throwException() {
  throw new CustomException('This is my first custom exception');
}

Source: stackoverflow.com

Similar codes

3 votes295 views2 answers
Flutter sleep
Dart
0 vote295 views1 answer
Pass by reference in dart
Dart
0 vote300 views1 answer
Flutter open phone dialer
Dart
0 vote293 views1 answer
Showing ads every x seconds flutter
Dart
0 vote287 views1 answer
What does translate do in transform widget fluter
Dart
0 vote305 views1 answer
Lazy iterable dart
Dart
17 votes278 views6 answers
Card border radius flutter
Dart
0 vote302 views1 answer
Srring reverse dart
Dart
4 votes306 views1 answer
Flutter textformfield hide underline
Dart
0 vote355 views1 answer
Dart create hash
Dart