Dart Class, Objects, Instance and reference Variable example. Dart Tutorial for Flutter #8.1

Object-Oriented Programming in Dart. Learn about how to use Class, create objects, define constructors and what are the reference and Instance variables in Dart with demo code.

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[osteenx]

You are a very good teacher. God bless you. When i become a professional full stack app developer and i start working, i promise to find you

[aviraltara]

To the people, who are learning from this tutorial after 5 years, dart has changed its features now it provide null safety that means int and string does not hold null value now, non nullable datatype to make them null by type casting use - int? nullableNumber;
String? nullableText; or use late keyword in front of it for example - late int x ;

[Winnerever]

Best ever, I thought i knew all the basics until I watched this play list.

[muhammadsaqib]

thanks for "Dart Tutorial for Beginners: Basics and Fundamentals" .

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You have created a much helpful Dart tutorial playlist. Thank you for your efforts.

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I am very thankful for this playlist. Thank you

[mrMayhem]

Very well done sir. Straight to the point and clear. Thanks!

[kashyapkarkar]

@Smartherd thank you for this amazing course . it cleared out my basics of programming in a really smooth and understandable way. <3 from India.

[PrimaClicks]

you have an excellent job. appreciate you man. Perfect!

[karthickrajalearn]

In 8m 07sec
Thanks for Mentioning Default Value

[kavinthapa]

You are such a Amazing tutor
Thanks a lot

[razasheikh]

you are my Guru Shiriank Sir :) i've learned a lot from you regarding Android Studio and now i'm learning flutter as well! i really appreciate your work!
Respect and your Student from Pakistan!

[ricardoaraque]

Hi, i'd like do an ask:

Why we know the values from an instance by the . instead the [], What type of var is a instance of a class?

[AR-okqt]

Hi Sir, How can you say that a variable is assigned with a class name or method name if while instantiating you are skipping the new keyword ?

[SignumCode]

hello sir your tutorial is really helping
but why i got error in this code
It should throw exception
void main()
{
var s1= Student();

try{
s1.age="20";
}catch(e) { print(e); }

print("${s1.name} is ${s1.age} year old");
s1.sleep();
s1.study();
}
class Student
{
String name = "Peter";
int age = 23;
void sleep()
{
print("${this.name} is sleeping.");
}
void study()
{
print("${this.name} is studying.");
}
}

[pranavyogeshbaradkar]

sir how can i learn advance dart tutorial. everywhere i am getting basic dart. please help. BTW great tutorial i understood many basic concept.

[animeshbanerjee]

we can write in that way without using *this keyword=>
void main(){
var s1=S();
s1.id=115;s1.name='animesh';
print('${s1.id} and ${s1.name}');
s1.read();
s1.sleep();
}
class S{
int id;
String name;
void read(){
print('$name is reading');
}
void sleep(){
print('$id is sleeping');
}
}
The code is working so why we need *this keyword here .
Please help me out ...I stuck here in oop concepts:-/

[haribabumanoharan]

If you give some exercise at the end of each video it will be more useful Thanks.

[zakblacki]

"this " usage is still a little confusing