Java Programming Tutorial - 04 - Defining a Class and Creating Objects in Java

Get the full course at: www.MathTutorDVD.com
In this lesson, you will learn how to define a class and create instances of that class (called objects) in the Java programming language.
Learn how to program in java with our online tutorial. We will cover variables, loops, if else branching, arrays, strings, objects, classes, object oriented programming, conditional statements, and more..

[@ZhibinHong]

so basically you explained a concept my teacher failed to do so in 2 hours..

[@TeoPooks]

LMFAO YO WHY IS THIS TRUE 😭. My professor would fail to teach the class this and I was just confused. Syntax is the same throughout programming but for sum reason classes and objects in Java just confused me

[@Diaming787]

I was confused with the entire concept of OOP for a long time, but this video is really clearing it up. Thank you!!

[@Squawking_Squatcher]

Love your videos. I've been trying to have that "aha" moment, but kept failing. You explain things so clearly that now I'm in that moment. Thank goodness for clear and concise video tutorials!

[@subratapodder5754]

Super useful video as well as the best explanation ever . I spend 3 to 4 days to find the suitable video , but then i came over this video.......... and bro seriously , this is "The best video" ever....I just fell in love with your explaination............

[@MathAndScience]

Thanks so much!

[@jeremyjay46]

This is one of the best explanation of objects that I've found on YT. Really helped make it "click" for me. Thanks.

[@bharatkumargupta]

The tutorial is really easy to understand. Thanks for such an amazing explanation. Checking out more tutorials on your channel.

[@1CheeseBurger]

Thank you! Explained it better than a "beginner" java book AND my college's lecturer.

[@EmilyAllan]

One of the best explanations I've seen on KZbin about objects in Java. You know what you are doing unlike other tutorials where they don't explain WHY its important. I wish all of your videos were up in entirety. Have you considered posting all of them for ad revenue?

[@colinjamieson6065]

Great Lesson, I have been batlling to grasp the linkage between the classes and the object creation

[@johnniewalker8186]

I just remember this video after years. Now Im Senior Software Engineer. Thank you ❤️

[@jj-xm5dq]

can you please provide the link for the next lecture? Great lecture!!

[@jamiestewart3072]

was struggling with getting my head around these concepts but this is so helpful and i now understand, thank you

[@andreastijerina7631]

Awesome! Thank you so much! You have no idea how much this has helped me!

[@MansourTP]

Thank you so much for this video Among all the videos, you are the only one who definded class and objects in easy way to understand

[@yohannesalmaw1414]

The best explanation ever for creating objects from classes in Java. Wow Thank a lot

[@aliciastephan8470]

Thought I would say that this video is extremely helpful for my AP computer science class. Hopefully I can buy your video series before my next test thank you!

[@Stettafire]

Greetings from the UK:) I'm currently creating a java program that creates a 'student' object, and this was really helpful, thank you:)

[@ye4us]

Your one of the best tutors ever, like for real. I wish I had you as my teacher in High-School. no cap

[@haltertopbabe]

this was incredibly helpful, thank you so much!!! you make it so easy to understand

[@Mike-up3rs]

super helpful video, your explanation made a lot more sense then a lot of places i have been learning from

[@satoshinakamoto171]

this is hands down one of the most valuable java tutorial in existence. i will pay this guy when i am rich.

[@luisishere987]

Thanks so much, helped me out tremendously for my AP Computer Science homework

[@susml767]

Oh my goodness, you are amazing brother. After millions and millions of videos, finallllllyyyy I found a person that can teach. 😢 ❤

[@irahyvonne9232]

can you make a tutorial in java with all the features of OOP(Abstraction,Inheritance,Encapsulation and Polymorphism) combined into one program???

[@qaautomationcult3868]

Creating Objects As you know, a class provides the blueprint for objects; you create an object from a class. Each of the following statements taken from the CreateObjectDemo program creates an object and assigns it to a variable: Point originOne = new Point(23, 94); Rectangle rectOne = new Rectangle(originOne, 100, 200); Rectangle rectTwo = new Rectangle(50, 100); The first line creates an object of the Point class, and the second and third lines each create an object of the Rectangle class. Please subscribe our youtube channel : kzbin.info/door/0xat537YITJbN_9GSMUALA Fb page : facebook.com/learn.automation.testing linkedin page : www.linkedin.com/school/14580724/admin/ website: www.qacult.com for various blogs and Upcoming Events This is about Automation Testing with industrial standards. Today IT is booming and so is the need for mobile. Thus the need for Automation of desktop web ap...

[@SgtManiak]

My instructor couldn't explain this as good as you did. Thank you very much.

[@CodeWaka]

THANK YOU!!!!!!! This was explained to me better than the Java Lang textbooks.

[@yasiralassadi2007]

mate i never comment on videos but your video make me have to its a great way of explaining

[@graham0]

The comparison to how you assign a typical data type (String, int, double etc) a value vs how you assign a class a value was very helpful, and cleared up why it was that I needed to type the class name twice ie. Aircraft aircraft = new Aircraft(). Thanks for the video :)

[@potatoitis3326]

THANK YOU! First year as a CS student. Midterms are coming up. This video was so helpful!!

[@tonykelly9469]

Excellent explanation (upper case class name convention aside), very clear. Better than the university lecture notes I have.

[@conormeaney7223]

You explain things amazingly well!

[@johnlestermontano157]

Thank you so much! Because of this video made our lesson clear to me!❤️

[@thefrontrowguyz3063]

This finally makes sense. Thank you for a great video. How do you access the rest of the series?

[@Mariamak98]

Wow u explained this very easily, the only one who I understood

[@johnyeszhan7403]

Well done. Very clear explanation. Thank you, sir.

[@luckychukiye8743]

Thank you. Thi is good for review as Im learning about methods now

[@ezechikezie5249]

thanks a lot for ur simplicity of the concept

[@kevind3946]

Awesome video. You explained classes and objects very well

[@mashiro-san9335]

Well explained sir!!! Very informative and easy to understand. Thank you (new aspiring programmer here)

[@TheRohithsai]

almost 3 videos..... best one thumbs up :D thanks

[@cindy-wz9cf]

wow one of the best tutorials I've seen by far

[@jenniredfield]

What's the next video after this? It'd help if there were numbers in the title of the video :) It's awesome though, it clarified some stuff for me Cheers x

[@qaautomationcult3868]

As you know, a class provides the blueprint for objects; you create an object from a class. Each of the following statements taken from the CreateObjectDemo program creates an object and assigns it to a variable: Point originOne = new Point(23, 94); Rectangle rectOne = new Rectangle(originOne, 100, 200); Rectangle rectTwo = new Rectangle(50, 100); The first line creates an object of the Point class, and the second and third lines each create an object of the Rectangle class. Each of these statements has three parts (discussed in detail below): Declaration: The code set in bold are all variable declarations that associate a variable name with an object type. Instantiation: The new keyword is a Java operator that creates the object. Initialization: The new operator is followed by a call to a constructor, which initializes the new object. Please subscribe our youtube channel : kzbin.info/door/0xat537YITJbN_9GSMUALA Fb page : facebook.com/learn.automation.testing linkedin page : www.linkedin.com/school/14580724/admin/ website: www.qacult.com for various blogs and Upcoming Events

[@thanossym2281]

Great video! you teach really well! thank you ! :)

[@happyjohn1656]

These 2013 videos still seem to happen to be quite helpful!... 10:24:30 PM 5/16/2019 1/2 of 60

[@sublime_tv]

I love how you explained how the classes you are creating is similar to the variables we've been using. Really cleared up the confusion.

[@qaautomationcult3868]

As you know, a class provides the blueprint for objects; you create an object from a class. Each of the following statements taken from the CreateObjectDemo program creates an object and assigns it to a variable: Point originOne = new Point(23, 94); Rectangle rectOne = new Rectangle(originOne, 100, 200); Rectangle rectTwo = new Rectangle(50, 100); The first line creates an object of the Point class, and the second and third lines each create an object of the Rectangle class. Each of these statements has three parts (discussed in detail below): Declaration: The code set in bold are all variable declarations that associate a variable name with an object type. Instantiation: The new keyword is a Java operator that creates the object. Initialization: The new operator is followed by a call to a constructor, which initializes the new object. Please subscribe our youtube channel : kzbin.info/door/0xat537YITJbN_9GSMUALA Fb page : facebook.com/learn.automation.testing linkedin page : www.linkedin.com/school/14580724/admin/ website: www.qacult.com for various blogs and Upcoming Events

[@isharaperera9866]

Thanks for the great explanation sir!

[@MohammedAMAlafifi]

Grate explanation , thank you very much,

[@rinny21]

Thanks this really helped me deeply understand objects in java👏

[@tunasalad3919]

Great way of explanation..especially with examples..Kudos..(Y)

[@johnypiper]

thanks for the tutorial...very understandable

[@nyarukooo]

OMG, Your voice is awesome, and you did absolutely good :)) Tnx

[@alifbryan7257]

clear explanation, thanks!

[@amukuncaroli6967]

thanks for breaking down for us . i understand it more

[@thepalindromeadept4038]

Nice, clear and well explained. Good job :D

[@rezaarian237]

finallllllllly someone explains it in English. thank you so much.

[@Aspiret620]

This tutorial was extremely helpful, thank you!

[@MathAndScience]

Welcome!

[@zarastern2238]

tnx, man! rly helped me out here. great lecture! +1 sub

[@saneledlamini7117]

The best ..I watch this every time before a Test

[@qaautomationcult3868]

Creating Objects As you know, a class provides the blueprint for objects; you create an object from a class. Each of the following statements taken from the CreateObjectDemo program creates an object and assigns it to a variable: Point originOne = new Point(23, 94); Rectangle rectOne = new Rectangle(originOne, 100, 200); Rectangle rectTwo = new Rectangle(50, 100); The first line creates an object of the Point class, and the second and third lines each create an object of the Rectangle class. Please subscribe our youtube channel : kzbin.info/door/0xat537YITJbN_9GSMUALA Fb page : facebook.com/learn.automation.testing linkedin page : www.linkedin.com/school/14580724/admin/ website: www.qacult.com for various blogs and Upcoming Events This is about Automation Testing with industrial standards. Today IT is booming and so is the need for mobile. Thus the need for Automation of desktop web ap...

[@nathaliadias1726]

This saved my Programming I grade, thank you!!!

[@naeemislam7303]

best video i have ever seen on class and objects .thanku very much

[@MathAndScience]

Welcome!!

[@scottscherzer3786]

I never comment on videos also I am pressed for time because I have an assignment due soon but thank you so much for this content. Sometimes our teachers are so experienced in this field that they go fast because its easy for them. Thanks for dumbing it down this helped me a lot.

[@snehaelizebeth6146]

Thank you sir!! Love from India..!

[@shavar67]

This was really helpful !!

[@ja8243]

Bruh this makes soo soo much sense. Thank you so much

[@sarahamy911]

Thank you so much for these videos. Would you please teach other high-level programming languages? Thanks a lot

[@rohullahrahimi1093]

I just want to write Thank you so much for this awesome video.

[@lenardolalo7600]

This channel very helpful ❤

[@louispienaar456]

very good explanation,thank you

[@Prince_of_tragedy]

that was more than great and helpful really thank you, but where please i can find your entire tutorial for java course.

[@Test-zx2yy]

Thank you. I was a great help on us.

[@rishidesai9755]

I love how you explain everything so nicely! Great Vid! subscibers++

[@williamhorn411]

oof, forgot that semi-colon.

[@cezarlagmay9575]

@@williamhorn411 he also forgot the symbol/identifier "int subscribers;"

[@williamhorn411]

@@cezarlagmay9575 Meh, it's safe to assume in this context that subscribers has already been defined. The semi-colon is the silent killer of beginners.

[@whosbeforebros]

learned more about planes than java

[@clarenskybenoit8755]

+whosbeforebros ? family

[@jonmarsh7914]

then youre paying attention to the wrong thing

[@qaautomationcult3868]

As you know, a class provides the blueprint for objects; you create an object from a class. Each of the following statements taken from the CreateObjectDemo program creates an object and assigns it to a variable: Point originOne = new Point(23, 94); Rectangle rectOne = new Rectangle(originOne, 100, 200); Rectangle rectTwo = new Rectangle(50, 100); The first line creates an object of the Point class, and the second and third lines each create an object of the Rectangle class. Each of these statements has three parts (discussed in detail below): Declaration: The code set in bold are all variable declarations that associate a variable name with an object type. Instantiation: The new keyword is a Java operator that creates the object. Initialization: The new operator is followed by a call to a constructor, which initializes the new object. Please subscribe our youtube channel : kzbin.info/door/0xat537YITJbN_9GSMUALA Fb page : facebook.com/learn.automation.testing linkedin page : www.linkedin.com/school/14580724/admin/ website: www.qacult.com for various blogs and Upcoming Events

[@rohatkarabulut2476]

This made me laugh bro, but still this video was extremely useful 👌

[@abdulrahmanmohammed9773]

I love it. Thanks

[@googleuser7454]

Great explanation

[@cjm101]

Thank you for these videos! im a beginner and its helping me Alot! can you or someone direct me to video where once you create a class instead of putting in variables your putting in methods, you mention you have other videos for this at around 3:05 of the video.

[@pascaldev4085]

So good explained! Thank you from Germany :)

[@MathAndScience]

Thanks for the great feedback! Good luck! Jason, MathAndScience.com

[@nickvolz4442]

Good video and explanation.

[@Jhon-hy6xk]

Nice video. Hei does somebody know what is the difference between that way of make class from this way: public class Lesson4 { public Lesson(){ this.exemple; this.exemple2; } } I saw this in mobile java aplication, it hadn't main(),istead it had the same name of its class as a constructor. Is the reason because it was for Android? thanks

[@dylanhess4906]

Good video, thank you!

[@deepakpandey4902]

awesome explanation

[@Milanista.92]

well done bro. nice vid

[@williamwallace234]

I have a question: how come the class definition doesn’t come before main? Wouldn’t that mean that the main method doesn’t yet know what aircraft is at the time of object creation? Of coarse it obviously works, but I was curious about the way this is processed and if it would be the same as defining aircraft first.

[@lambmaster]

Great explanation! I think I get it now. So, when creating the object piperSaratoga, can I put something else into it other than "new aircraft()"? Just curious.

[@pk951]

Great video. Wish my professor taught this way. All she does is talk about stuffs that no one understands.

[@SmartProgramming]

nice one, keep it up 👍👍🙂🙂

[@xcvxcvcxvxvcq]

best explanation of java OOP on youtube!

[@MathAndScience]

Thank you! Jason, MathAndScience.com

[@rik9833]

a class is a template for our object; a object is where the the computer stores memory in the program. type name = new type()

[@sraptes]

Helpful!

[@EvaSlash]

if it was not for your videos I would be totally screwed in my class right now. hurry and please release more volumes! I own vol 1 and 2 so far and plan to pick up 3.

[@liliacfury]

After saying ”aircraft piperSaratogs = new aircraft();” can you replace ”new aircraft()” with any thing different? Like maybe just one or a few of the specific variables and / or functions created within the class?

[@Jameselcome_303]

Great video! how do you access the example?

[@Fnaf-vh9cs]

nice explication thanks man a bit late but thank you SIR.

[@brianschwantner8729]

I wish you were my professor cause mine sucks. Thanks for the video, very helpful!

[@lucjanmusk]

ohhhhh, wow was overtaken by this classes in java but right now System.out.println("I understand all of them");

[@milankbudha]

what is the purpose of using new keyword while creating object..plzzz leave a reply.thank you

[@Jack-it5yg]

Thank you!

[@Duha_01]

should we always create the object in the main method

[@tannichoudhury8718]

Where can I find exercises that Jason was talking about?

[@rijosey2152]

thanks bro great vido

[@brunelngoufack9976]

thanks your the best