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Hello, I want set a value of extended class. How can i do it? Thanks.

Dart
 class A {
     String? value1A;    

   A({ 
    this.value1A, 
  });
}

class B extends A {

   String value1B = "";  

   value1A= ""; //<= I can't assing a value
 
}


What I have tried:

Dart
class B extends A {

   String value1B = "";
   

   value1A= "";
   super.value1A="";
   A newA; 
   newA.value1A= "";   
 
}
Posted
Updated 3-Mar-24 3:53am
v2

1 solution

The issue with your code is that you're trying to assign a value to value1A directly in the class body of B. In Dart, you can’t assign values to inherited variables directly in the class body. You should do this inside a method or constructor.

Dart
class A {
  String? value1A;

  A({ 
    this.value1A, 
  });
}

class B extends A {
  String value1B = "";  

  B() {
    value1A = ""; // Now you can assign a value
  }
}
 
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v4
Comments
gacar 3-Mar-24 10:45am    
Thank you!

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