Polymorphism_Dart

 import "dart:io";

/// Polymorphism : Polymorphism is defined as ability to take more than one form.
/// there are two types of polymorphism : Compile time and Run time
/// Compile time polymorphism OR (method Overloading) : class name same, method name same but different
/// argument it is called method overloading OR Compile time polymorphism.
/// Run time polymorphism OR (method Overriding) : Method name same, argument same but different
/// class it is called method overriding OR Run time polymorphism.
///
/// "Compile-time polymorphism" is not supported in dart(Flutter)
/// Below is Run Time polymorphism OR (Method Overriding) Example
/// Example 1
// class Aone {
//   void play() {
//     print("This is from Class Aone : First Class");
//   }
//   int ground(int no) {
//     return no;
//   }
//
// }
// class Btwo extends Aone {
//   void play() {
//     print("This is from Class Btwo : Second Class");
//   }
//   int ground(int no1) {
//     return no1;
//   }
// }
// void main() {
//   Btwo object = new Btwo();
//   object.play();
//   print(object.ground(123));
// }

/// Example 2
// class Vehicle {
//   void run() {
//     print("Vehicle is Running");
//   }
// }
// class Bus extends Vehicle {
//   void run() {
//     print("Bus is Running");
//   }
// }
// void main() {
//   Vehicle vehi = new Vehicle();
//   vehi.run();
//
//   Bus bus = new Bus();
//   bus.run();
// }


/// Example 3
class Employee {
  void salary() {
    print("Employee salary is \$1000");
  }
}
class Manager extends Employee {
  void salary() {
    print("Manager salary is \$2000");
  }
}
class Developer extends Manager {
  void salary() {
    print("Developer salary is \$3000");
  }
}
void main() {
  Manager manager = new Manager();
  Developer developer = new Developer();

  manager.salary();
  developer.salary();
}

/// NOTE :
//Poly means many and morph means forms. Polymorphism is the ability of an object to take on many forms.
// As humans, we have the ability to take on many forms. We can be a student, a teacher, a parent,
// a friend, and so on. Similarly, in object-oriented programming, polymorphism is the ability
// of an object to take on many forms.
///Note : In the real world, polymorphism is updating or modifying the feature, function,
/// or implementation that already exists in the parent class.
/// Polymorphism by method Overriding
//Method overriding is a technique in which you can create a method in the child class
// that has the same name as the method in the parent class. The method in the child class
// overrides the method in the parent class.
/// Syntax :
//class ParentClass{
// void functionName(){
//   }
// }
// class ChildClass extends ParentClass{
// @override
// void functionName(){
//   }
// }

Comments

Post a Comment

Popular posts from this blog

Second GET API Calling with Bloc simple Example in Flutter

Image
  import "package:api_with_bloc/Fourth_Get_API_call_using_Bloc/bloc/users_bloc.dart" ; import "package:api_with_bloc/Fourth_Get_API_call_using_Bloc/bloc/users_bloc_states.dart" ; import "package:flutter/material.dart" ; import "package:flutter_bloc/flutter_bloc.dart" ; void main () { runApp ( const MyApp () ) ; } class MyApp extends StatelessWidget { const MyApp ( { super .key } ) ; @override Widget build ( BuildContext context ) { return BlocProvider < UsersBloc >( create: ( context ) => UsersBloc () , child: MaterialApp ( title: "HomePage" , debugShowCheckedModeBanner: false, theme: ThemeData ( appBarTheme: const AppBarTheme ( backgroundColor: Colors. grey , centerTitle: true, ) , ) , home: const HomePageFourth () , ) , ) ; } } class HomePageFourth extends StatelessWidget { const HomePageFourth ( { super ....
Read more

Stack Container Scrollable Card widget UI with Custom Widget

Image
  import "package:flutter/material.dart" ; void main () { runApp( const MyApp ()) ; } class MyApp extends StatelessWidget { const MyApp({ super .key}) ; @override Widget build (BuildContext context) { return MaterialApp ( title: "Card Container Stack" , debugShowCheckedModeBanner: false, theme: ThemeData ( appBarTheme: const AppBarTheme ( backgroundColor: Colors. grey , centerTitle: true, ) , ) , home: const CardContainerStack () , ) ; } } class CardContainerStack extends StatelessWidget { const CardContainerStack({ super .key}) ; @override Widget build (BuildContext context) { return Scaffold ( appBar: AppBar ( title: const Text ( "Scrollable Containers" , style: TextStyle (fontWeight: FontWeight. bold ) , ) , ) , body: SingleChildScrollView ( child: Center ( child: Column ( mainA...
Read more

Pagination with Bloc Pattern in Flutter

Image
  import "package:flutter/material.dart" ; import "package:flutter_bloc/flutter_bloc.dart" ; import "package:pagination_practice/Pagination_with_Bloc/Bloc/bloc.dart" ; import "package:pagination_practice/Pagination_with_Bloc/Bloc/event.dart" ; import "package:pagination_practice/Pagination_with_Bloc/Bloc/state.dart" ; import "package:pagination_practice/Pagination_with_Bloc/post_repo.dart" ; void main () { runApp ( const MyApp () ) ; } class MyApp extends StatelessWidget { const MyApp ( { super .key } ) ; @override Widget build ( BuildContext context ) { return RepositoryProvider < PostRepo >( create: ( context ) => PostRepo () , child: BlocProvider < PostBloc > ( create: ( context ) => PostBloc ( context.read < PostRepo > () ) ..add ( FetchPostsEvent () ) , child: MaterialApp ( title: "Pagination" , debugShowCheckedModeBa...
Read more