I have two classes from the first class, I am trying to pass value to the second class. I have defined the required constructor and argument in both of the classes. But the problem is that whenever I try to retrieve the value of first class in the second class, the value is always null.

**First Class**        

   suffixIcon: IconButton(
                    icon: Icon(Icons.send),
                    onPressed: () {


                      setState(() => _getVin.text);
                      LandingPage(VinNumber:_getVin.text);
                    }
                )



**second class**
class LandingPage extends StatefulWidget {

   String? VinNumber;  //This value is null
     LandingPage({Key? key, this.VinNumber}) : super(key: key);

    @override
  _LandingPageState createState() => _LandingPageState(VinNumber);
}

class _LandingPageState extends State<LandingPage> {
 String? VinNumber;
 _LandingPageState(this.VinNumber);