Programming in Dart: Classes

Jun 28 2022 · Dart 2.17, Flutter 3.0, DartPad

Part 1: Understand Classes

02. Create a Class

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Previous episode: 01. Introduction Next episode: 03. Challenge: Create a Custom Class

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Dart is known as an object oriented language. This means, we use objects as a way to organize our code. But what does this even mean? Well, when you start writing a program, you end up breaking that program into smaller tasks. For instance, some parts of the program will respond to user input. Other parts will save or load data. Other parts may even fetch things over a network and so forth.

class Person {

}

var firstName = '';
var lastName = '';

void sayHello() {
    print('Hello, my name is $firstName $lastName');
}

var weatherMan = Person();

weatherMan.firstName = 'Phil';
weatherMan.lastName = 'Connors';

print(weatherMan.firstName);

var singer = new Person();

var singer = Person();

singer.firstName = 'Janet';
singer.lastName = 'Joplin';

weatherMan.sayHello();
singer.sayHello();