"dart try catch" Code Answer's
You're definitely familiar with the best coding language Dart that developers use to develop their projects and they get all their queries like "dart try catch" answered properly. Developers are finding an appropriate answer about dart try catch related to the Dart coding language. By visiting this online portal developers get answers concerning Dart codes question like dart try catch. Enter your desired code related query in the search bar and get every piece of information about Dart code related question on dart try catch.
dart try-catch
try {
// ...
} on SomeException catch(e) {
//Handle exception of type SomeException
} catch(e) {
//Handle all other exceptions
}
Source: stackoverflow.com
dart try catch
try {
breedMoreLlamas();
} on OutOfLlamasException { // A specific exception
buyMoreLlamas();
} on Exception catch (e) { // Anything else that is an exception
print('Unknown exception: $e');
} catch (e) { // No specified type, handles all
print('Something really unknown: $e');
} finally { // Always clean up, even if case of exception
cleanLlamaStalls();
}
Source: dart.dev
dart try
HOW TO HANDLE EXCEPTIONS IN DART/FLUTTER!
# ------------------------ CASE 1: --------------------------- #
When you know the exception to be thrown, use ON Clause
try {
int result = 12 ~/ 0;
print("The result is $result");
} on IntegerDivisionByZeroException {
print("Cannot divide by Zero");
}
# ------------------------ CASE 2: --------------------------- #
When you do not know the exception use CATCH Clause
try {
int result = 12 ~/ 0;
print("The result is $result");
} catch (e) {
print("The exception thrown is $e");
}
# ------------------------ CASE 3: --------------------------- #
Using STACK TRACE to know the events that occurred before the
Exception was thrown (trace and print the code steps after the
error)
try {
int result = 12 ~/ 0;
print("The result is $result");
} catch (e, s) {
print("The exception thrown is $e");
print("STACK TRACE \n $s");
}
# ------------------------ CASE 4: --------------------------- #
Whether there is an Exception or not, FINALLY Clause is always
Executed
try {
int result = 12 ~/ 3;
print("The result is $result");
} catch (e) {
print("The exception thrown is $e");
} finally {
print("This is FINALLY Clause and is always executed.");
}
# ------------------------ CASE 5: --------------------------- #
Custom Exception.The throw keyword is used to explicitly raise
an exception, and, in this case, that exception was defined by
the following exemple:
void main(){
try {
depositMoney(-200);
} catch (e) {
print(e.errorMessage());
} finally {
// Code
}
}
class DepositException implements Exception {
String errorMessage() {
return "You cannot enter amount less than 0";
}
}
void depositMoney(int amount) {
if (amount < 0) {
throw new DepositException();
}
}
All those coders who are working on the Dart based application and are stuck on dart try catch can get a collection of related answers to their query. Programmers need to enter their query on dart try catch related to Dart code and they'll get their ambiguities clear immediately. On our webpage, there are tutorials about dart try catch for the programmers working on Dart code while coding their module. Coders are also allowed to rectify already present answers of dart try catch while working on the Dart language code. Developers can add up suggestions if they deem fit any other answer relating to "dart try catch". Visit this developer's friendly online web community, CodeProZone, and get your queries like dart try catch resolved professionally and stay updated to the latest Dart updates.