Flutter constructor

Since a factory constructor does not directly create a new instance, it cannot use a constructor initializer list . A normal constructor always returns a new instance of the class. A factory constructor is permitted to return an existing instance, an instance of a derived class, or null .

It is option to declare within the class. All class have own constructor but if we don’t declare or forget then Dart compiler will create default constructor automatically by passing the default value to the member variable.

It is option to declare within the class. All class have own constructor but if we don’t declare or forget then Dart compiler will create default constructor automatically by passing the default value to the member variable.

You can only have one unnamed constructor, but you can have any number of additional named constructors in Flutter . By using named constructor you can create multiple constructors in the same class.

Dart Constructors A constructor is a special function of the class that is responsible for initializing the variables of the class . Dart defines a constructor with the same name as that of the class.

Dart Constructors A constructor is a special function of the class that is responsible for initializing the variables of the class . Dart defines a constructor with the same name as that of the class.

There are three types of constructors in Dart: Thus, if a constructor which don’t have any parameter then it will be a type of default constructor.20 Tem 2020