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

1 vote203 views2 answers
Dart typedef
Dart
0 vote214 views1 answer
FilterChip backgroung color opacity
Dart
0 vote182 views1 answer
How to subtract he height of appbar in flutter
Dart
5 votes189 views1 answer
Flutter gesturedetector
Dart
23 votes225 views4 answers
Flutter dateFormat
Dart
1 vote178 views4 answers
Flutter remove item from list
Dart
49 votes269 views4 answers
Parse string to datetime
Dart
11 votes181 views2 answers
Flutter stateful widget
Dart
0 vote192 views1 answer
Image not shoing when i use network image,flutter
Dart
4 votes191 views2 answers
Asset image in circle avatar flutter
Dart