Classes & Objects

A class describes fields and methods; ClassName(...) creates an object from it, Dart doesn't require the new keyword, unlike Java or C#.

Example: a Student class

class Student {
  String name;
  String track;

  Student(this.name, this.track);
}

void main() {
  var ada = Student('Ada', 'Frontend');
  print('${ada.name} is studying ${ada.track}');
}

Ada is studying Frontend

Student(this.name, this.track); is Dart's compact constructor shorthand, this.name directly assigns the constructor's first argument to the object's own name field, with no separate assignment line needed inside the constructor body, the way Java or C# would require. This exact same "class describes a blueprint, new instances get created from it" pattern is precisely how Flutter builds every single UI widget, which is exactly why learning Dart's classes first makes Flutter's structure click much faster.