Programming in Dart: Classes

Jun 28 2022 · Dart 2.17, Flutter 3.0, DartPad

Part 2: Learn Inheritance

14. Challenge: Override a Method

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Previous episode: 13. Override Methods Next episode: 15. Use Abstract Classes

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So now you have a good idea about subclasses and then how to override methods, it’s time to put your newfound skills to the test. I want you to create a Profile class. It should contain a user name which is a string, a user id which is an int, and interests with is a list of strings.

class Profile {

}

int userId;
String username;
List<String> interests;

Profile(this.username) : userId = 0, interests = [];

@override

String toString() => 'userId: $userId, username: $username, interests: $interests';

var profile = Profile('Larry');

profile.userId = 100;

profile.interests.add('swimming');
profile.interests.add('dancing');
profile.interests.add('coding');

print(profile);