Jump Inheritance Example

readme.md

Jump Inheritance Example

Created with <3 with dartpad.dev.

main.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  int score = 0;
  
  void runCar(Jump jump) {
    setState(() {
      score = score + jump.move();
    });
  }
  
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('Jump Inheritance Example')),
        body: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Text('Distance: ${score} meters'),
            SizedBox(height: 20),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
              children: [
                ElevatedButton(
                  onPressed: () => runCar(NormalJump()),
                  child: Text('Jump'),
                ),
                ElevatedButton(
                  onPressed: () => runCar(SuperJump()),
                  child: Text('Super jump'),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

class Jump {
  int move() {
    return 0;
  }
}

class NormalJump extends Jump {
  @override
  int move() {
    return 10;
  }
}

class SuperJump extends Jump {
  @override
  int move() {
    return 50;
  }
}