Java Polymorphism Fully Explained In 7 Minutes
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- เผยแพร่เมื่อ 17 เม.ย. 2021
- Complete Java course: codingwithjohn.thinkific.com/...
What does polymorphism mean in Java? So many classes and courses overcomplicate it, but polymorphism is really super simple. We'll talk about what polymorphism means in Java, and go over two different kinds.
Polymorphism is one of the 4 core concepts of Object-oriented programming languages. And it's such a scary sounding word, but it refers to a simple concept.
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This guy is way too underrated 🔥
Yes!
Boring stuff
@@MrSkinkarde why are you watching if you're not interested 😂
He was born to teach Java
@@MrSkinkarde You're Finnish, aren't you?
My Univ. professor couldn't explain it to me like this over a whole semester!
Now here I am understanding it in under 10min.
Thank you!
Perhaps you should have come here first
John has some very good videos, but this one is kinda disappointing, I'd say. It's not exactly polymorphism what John is explaining here. It's more like he's only describing inheritance. That said, I think you should have listened more carefully to your Professor instead.
"If you can't explain it simply, you don't understand it well enough." - Albert Einstein
maybe bc you love dogs and cats
@@michimarz What? Did you even watch the video?
2024 and this is still the best short explaination of polymorphism on TH-cam.
Maybe theyre wrong
Very good videos. You explain things in ways that eliminates confusion and covers all bases.
Dude. You really just saved my entire life. I was having so much trouble understanding how to explain polymorphism and putting it into my own words. You explained it so perfectly in so many ways. Great content!
lol entire life? a little dramatic aren't we
@@mmq6525got somethin’ to prove now do we?
@@mmq6525 bros got gun to his head by boss as we watch
It's always nice to see you still got the basics down, even though I think I never EVER went and thought "I'm gonna use polymorphism on that sucker", but just went and did it.
Thanks John! After hours of trying to find a clear explainaton you wrapped it up in 7 minutes, thanks again!
That was such a simple explanation that was being made WAY too complicated in my class. Thank you for putting this stuff out there.
The fact that this was explained so perfectly and clear and it just clicked so well. Amazing job done!
I really wish I had found you and your channel months ago. Even though you are speaking fast, I am grasping and retaining the concept to write into code.
Thank you so much!!!
I don't know how to express my gratitude dude, you've saved me. I've been struggling really hard with my Java class and you have a gift for explaining in a way that scratches my brain the right way.
Thank you! I'm so happy that I found your video. I definetely watch other content from you, since you explain this topic so clearly. This makes so much more sense even in English compared the videos of my native language in which I just don't understand this subject at all.
Hi John, thanks for your Java tutorials with non-monotone voice. If you can explain more about composition and aggregation in Java that would be great (your explanations are easier to digest compared to other youtube tutorials)!
excellent spent 2 hours watching diff videos to understand the concept but you explained way better and way easy from all of them
You have no idea how I struggled to understand this, about 5 hours before exam i stumbled upon this video, thank you. It was super easy to understand, never thought someone could explain polymorphism this way
The best Java programming youtuber !! Wish I had known his channel back in 2021 beginning when I started the programming module in Uni.. Explains way better than many of my lecturers ! Thank You !!!
Great explanation. I've been trying to study up for an interview (has been years since I graduated and been in a different field so I forgot everything). When I was studying it wasn't clear that method overriding and method overloading were part of Polymorphism. They made it seem like they were totally different things so thank you for clearing it up!
You are an amazing teacher, know that. I've been doing a lot of java courses and these topics are always convoluted and extremely difficult to understand, but you've managed to explain in a simple way. Thanks!
Thanks for the video! You're helping a beginner coder in college out quite a bit :)
Long time im out of programming life but seeing this video kinda make me happy remembering some stuff. Also very good explanations!
Jonny Sins is the best at teaching programming
You have not fully understood a problem if you can not explain it to someone else.
This guy is an expert in his field making the explanation affordless
John is so concise in his teaching, my lecturer literally takes two hours to cover the exact same concepts
memento mori
@@eternalflames911 🖤🤍
O that's great and I'm learning more on your channel! Thank you for this!
Love from the Philippines!
This was a fantastic explanation that I was able to wrap my head around, bravo good sir!
I always wonder why University teachers spend whole semester to explain the topic but you still don't understand, but here on you tube you watch 7 minutes video about the topic and fully understand what the heck it is all about .
Thank you John very much for your great content!
University teachers are not programmers. If you want to learn how to swim i think its best to learn from someone that already knows how to swim
John has some very good videos, but this one is kinda disappointing, I'd say. It's not exactly polymorphism what John is explaining here. It's more like he's only describing inheritance. That said, I think you should have listened more carefully to your Professor instead.
Surely your college teachers aren't spending an entire semester explaining one concept to you. Java [programming] doesn't come easily or quickly to everyone, maybe hit the books a bit harder or do what you're doing here: supplement your college lessons with YT videos.
I'm in a Java course and wasn't understanding this topic. Now its perfectly clear. THANK YOU!
Man how did i only find this channel now great content so easy to understand concepts the way you explained in this video!!
straight to the point way of explaining this concept, most others just over-complicate it and are needlessly verbose.
Subscribed!
with polymorphism also you can always assign a subclass object type to a super class reference type
like that
Animal cat = new Cat();
Animal dog = new Dog();
Animal a = new Animal();
Since
Animal cat = new Cat()
| |
| |
Reference type object type
Happy coding everyone.
Actually this is the correct explanation of polymorphism. The video content explains inheritence mechanics of OOP. Inherıtance provides child class type object act like parent class type object by inheritence. Polimorphism provides parent class type object can act like chıid class type object. Internal mechanics are very different.
So does the reference type or object type determine which method is used
@@elizaalwani9200 The object type
@@elizaalwani9200 The object type does.
@@elizaalwani9200 the object type does. BUT the availability of methods is determined by the reference type.
Very clear and easy to follow.
Thanks John ✌
You're way of explaining is playful and very expressive. ❤️ it
Thank you for the clarification on overloading vs overriding.
excellent video. I am a CIS student this is now starting to all make sense.
this guy explained a concept in 7 minutes so much better than my professor could in 2 hours. Unreal man. Such a lifesaver
Hi,John...you made my life so easy..was struggling to understand the polymorphism concept until i found your video...much love from india
Just found you today and am so thankful I did! Thank you!!
Wow this is just amazing.
Currently studying computer science and you help me so much!
Very well explained! Thank you John for sharing this
Unbelievably clear. Thank you!
i usually never comment on videos, but this guy deserves it all. help me finally end my struggle with CSE 205.
Thank you so much. I was looking at a video at linkedin learning an I was about to quit learning java due to that video. You made it so simple and easy. Thank you from the bottom of heart.
Your channel is still very new, but wow, if you keep this up you're going to grow exponentially. Love your content please keep it up.
Ur explanations are as clean as ur code John. Thank you
It was a nightmare to find a video to understand Polymorphism. Thanks a lot.
Heyy thank you for this video. Your pronunciation as well as explanation are really easy to understand for a Vietnamese student like me. Keep uploading more informative video please 🙏 Have a nice day ☺️☺️
Thank you for helping me get through my first year as a graduate student!
awesome video. The code examples really help too!
I use method overloads all the time in c# systems class but didn't know it's a result from polymorphism. Thanks
Thank you for making these videos. You are a great teacher and communicator. Kind regards. 🙂
Thank you, please do for the other 3 java core concepts as well!
So fun with John...geez I have to get his training...makes Java fun.
Thank you for the videos. I have humble request for you to make a clear and understandable videos regarding polymorphism via inheritance and polymorphism via interface and passing an object as argument. Thank you once again for good video.
Amazing explanation. I'm sure you already know but your teaching skills are helping thousands of students including myself. Thank you so much!
Thank you for the content and for being humble, keep it up :' ) Much Love.
You really are a great explainer, thank you! I also didn't get the concetp at uni
Thanks!! you doing a great job explaining this!! Really appreciate!!
Words fall short to convey how helpful this lecture was sir.Thank you ❤❤
I think what you have described here is simply inheritance & method overloading. Polymorphism is a bit more advanced than that. You could for example have declared the cat and dog objects as Animal. That would at least have introduced the concept of polymorphism.
Finally found a video and understood it. Thanks man
Thank you sir for making this concept easy to understand.
Simple and clear explanation, thanks John!
I am currently studying for my finals exam in Germany and this is just perfectly explained. THANKS!
This guy knows the art of teaching, he explained all the concepts in such a smooth way, he makes learning fun & interesting 😇👍
Explaining what my comp sci professors couldn't explain during lectures...I do realize you have the benefit of hindsight and editing to make videos go a lot smoother than lectures, and there absolutely is value to lectures since we can actively ask questions and receive answers...But the way you structure your videos has been all but confusing thus far. Love this page.
Awesome now I will never forget about method overriding and overloading
Thank you so much John! you have helped me so much with my internship! Shout-out from Australia
this was very helpful! Thank you so much, John😀
Thank you for explaining the topic so well..... I found your material way easier to digest than my java class! Doing God's work out there.
Clear and to the point, great video
You kinda left out the main point of Polymorphism. The conclusion should be that you can store all the different instances (e.g. of Dog, Cat, ...) in Animal variables and it still does the proper thing! Usually you e.g. have a List which contains different animals, and you can just call the eat() function on each element without worrying what type it actually is.
Very fast and excellent lecture!he suits me!
I got override just at this time . many thanks !
Well done my guy. Great video
2-3 uni lectures in 7 minutes, ur amazing!
Explaining things better than youtubers with 500k+ Subscribers ...John you are doing gods work thank you so much
He made it Simple. Thank you 😊
very helpful. Understood polymorphism and encapsulation in less than 30 minutes.
John you might be one of the best tutors on TH-cam🙏🏼
this helped me so much!!! thank you
Very helpful! Thanks for sharing!
You're really good at explaining/teaching! If I pass my midterm, I'll owe my grades to you lol
I don't understand why nobody can explain Polymorphism in such a simple yet elegant way!
Great job! Very clear explanation.
Polymorphism is overrider & overload Parent methods.
Thank you John
WOW no words would express how useful your videos are 🙏
My dude is awesome. Would be awesome to work under someone with his knowledge...and humor.
Binge watching this man's videos. He's something else!
Hey really great video, u make it look easy.. thx!
My comp sci final is in two days and you are the only reason I'm not crying right now.
BRO THANK YOU SO SO MUCH U CHANNEL IS SAVING MY LIFE RIGHT NOW
Man you are a savior! Now i finally understand it!
Realy great explanation with a simple example!
One of the best!
thank you brother John :)
God bless any TH-camr including you John who teaches coding.
Yoo John you are incredibly brilliant at teaching Java.
Watching this video i exclaimed three times "Wow! this guy is great". Subscribed.
Hi John, you are such an awesome teacher.
this was great! Thank you!
I was really confused
but after watching this, I realized that I have done this in my program already but I don't know it's polymorphism .. thanks
wow, i have asked and "re-asked" my professor to explain this to me. and i just wasnt getting it. ive learned more in the first 3 minutes of your video then what my prof. has been trying to explain to me in 4 weeks. Thanks so much.