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

19 votes154 views5 answers
Flutter padding top and bottom
Dart
0 vote133 views1 answer
Flutter dropdown overflow
Dart
10 votes129 views1 answer
Dart string interpolation
Dart
1 vote124 views1 answer
Dart list insert
Dart
21 votes158 views3 answers
Dart while loop
Dart
5 votes82 views1 answer
Dart async
Dart
2 votes133 views1 answer
Dart add two strings
Dart
5 votes155 views2 answers
Load svg in imageprovider flutter
Dart
0 vote135 views1 answer
Crossaxisalignment.stretch row in column flutter
Dart
1 vote119 views2 answers
Text substring dart
Dart