Abstract Classes and Methods in Java Explained in 7 Minutes
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- Опубликовано: 9 июн 2024
- What are abstract classes and methods in Java, and how and why would you use them?
Also, what's the difference between an abstract class and an interface?
Abstract classes can seem like a wacky, complicated Java concept, but they're pretty simple. We'll explain them in just a few minutes in this beginner Java tutorial video lesson.
How do I make an abstract class, or an abstract method? Why would I want to use an abstract class in Java? What makes an abstract class different from an interface?
Learn or improve your Java by watching it being coded live!
Hi, I'm John! I'm a Lead Java Software Engineer and I've been in the programming industry for more than a decade. I love sharing what I've learned over the years in a way that's understandable for all levels of Java learners.
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Love that you explicitly ask and answer the question that every beginner would have: "Why would I want to do this?" Five stars.
agreed
Exactly! I understood the concept, but didn't get why and when we should use it... it's like reading a manual of a hammer, but not knowing when I should use one!
Right?! I think this is why his tutorials/explainations are so good. I am always asking "Why?" or "When?" when learning about these concepts.
Yes, that's why Im always looking for his videos, just for that question
When John starts "Now, you're probably thinking...", you're like "How did he know what I was thinking?" 😅
Been staring at and abstract problem for hours trying to actually understand whats going on. Clarified it in a few minutes perfectly. Thanks Man!
I wanna cry at how good these videos are, your explanation and walkthrough is just flawless. Thanks John I REALLY appreciate the work and content you're putting out here man, seriously appreciate you.
My god, you were able to explain everything in just a few minutes when it was taking hours for myself to understand. Thank you!
I have never understood the Difference easier in my 6 years of experience. But you Made me understood this in juz 6 mins. A Royal Salute...
That last part with that almost straight face was so funny, people be binge watching something on netflix and I be binge watching your videos they are so crisp and clear and easy to understand, a bow down to you.
Dude, you truly are amazing. Thank you. I'm an engineering student and you have teached me far more than any of my programming professors have!
Couldn't agree more
Probably one of the best explanations I've gotten so far about abstraction. I've been so stuck on this concept, but now I have a better understanding on how to tackle my assignment. Thank you!
Yeah, sometimes weird examples really helps u understand concept.
Also worth noting that abstraction as a concept is great for making your code maintainable- if you decide later on to use some other implementation, you can switch it out because it implements the same abstract class, and calls on it won't break the rest of your code
Got much clearer undertstanding when and where to use Abstract and Interface. I never saw anyone explain this easy and quick. Would be happy to learn more concepts from your videos.
Wow. In just a few mins you clearly explained concepts that weren't clear to me. You're phenomenal. Thanks for this
You explain things SO well. I keep turning to your videos instead of class lecture material to really understand these concepts. THANK YOU for doing this - it truly makes all of the difference. Seriously appreciate your videos and what you do.
You are such a great teacher very simple and clear.
You really have a knack of explaining seemingly complicated concepts easily. Thanks!
I have seen many video tutorials about Java but none of them like yours could transmit the concepts so well! Thank you sooo much!!!
i have been trying to understand this for the past one hour and this 7 minute video made the concept crystal clear in my head thank you so much :)
It can't be explained better than this... you solved my headache in 7 minutes. Thanks so much.
Wow. What a way to clear up the mess I had on my brain since long time. Now I can make my mind when to use what. Thanks a ton brother..!
Short and clear explanation - that's what a beginner needs. Thank you so much John!
seriously this was one of the best java explanation videos I've ever seen. Thank you John!
Gotta tell ya, now abstract classes and interfaces are beginning to make sense! Thanks, John! Really appreciate it!
Thanks a lot for sharing your knowledge.
I am still learning very important details from you after 20+ years of experience.
You are one of the best teachers out there on java.
Hats off to you sir.
This made me understand everything that's been missing from my course for the past 2 years. It'll help me greatly, thanks!
This channel is such a bliss. Great content, and no useless wanderings on unrelated topics.
Hello John
Abstract Class is a flexible dynamic Interface and I can say it is a CONTRACT Statement that we NEED and Must enforce the client to apply for example.
Thank you so much for your clear video.
Allah bless you.
Regards
The tempo/pace of your uploads are really optimal. You keep it on point without getting into bunch of sidetracks. Those times I've wanted to quickly understand a topic and chose one of your videos, I've never felt restless because of slow talking or too much information and yet got a good understanding of the topic. Keep it up!
I Felt the exact same thing. I just wasn't sure how to express it and you are on point 💯
Thanks john. I was doubtful about this for years. Your crystal clear explanation made me understand this properly today ❤💯.
amazing videos!! clear and easy explanation!! with code examples!!
I always have struggled with this concepts
thank you!!
Keep making these short videos really refreshes concepts and I don’t need to go back searching for things now.
that's the best explanation i've ever seen on this topic
The best and simplest explanation I've ever seen. Thank you.
Thanks for clarifying this! Best video on the subject that I can find!
THANK YOU so much!! All your videos so far are simple & precise.
This 7 minutes video is much better than the long 2 hours lecture
Really appreciate your comunnication skills and ur effort devoted on this video
there's so many java tutorial but this is truly a gold mine
John I am learning java and I am on an intermediate level but your videos always help. I wanted to make sure the things I knew about interfaces and abstract classes were right and now I'm sure more than ever. Thank you
Another coment.
Tbh i have never seen a better programming chanel in my whole live.
Explenations are always on point, I always get it straight away. We appreciate your work :)
I can't believe that it has been 2yrs allready since u made this thank u so much ❤
Thanks you for taking the time and effort to make these tutorials!
This was the best explanation I got for the difference between interfaces and abstract classes!! Really grateful for your amazing work!
Thanks John! I love your memorable examples and well explained "why"s, way easier to grasp these topics!
Much clearer than other videos. Thanks!
it took you 7 minutes including an introduction for the same content my teacher talked for hours( and I still wasn't sure what the hello was going on). Awesome, now I understand. Thank you.
Well explained and super easy to follow.
Thanks John.
Really clear explanation, nailed it. Thank you!
I was looking for learning Java
This channel is like God sent !
Bless you !
Amazing. Finally understood the concept behind all that
Something I often dislike about coding tutorials is that the obvious questions of why and how aren't addressed or beat around the bush on. Thank you for explicitly stating and answering all the doubts I had in mind. Appreciate it :)
When a 6min video is more efficient than an hour class of abstraction and interfaces 🙌 earned a sub brother appreciate the finals help 🙏
Really Clean and Precise keep up the good work.
Really clear explanation about differences between abstract and interface. Thank you!
I loved how "easy" this was to process in my brain compared to hours upon hours of attempts to get it in my head during college. Thank you!
was confused in the class about this abstract and interface, now super clear! thank you so much
Love it. I've been having a bit of trouble wrapping my head around this concept. Thanks a bunch!
Hey man, amazing video ! Exactly what I was looking for!
I was looking for abstract class vs interface , and this was exactly that. Even though you didn't mention "interface" in your video's title. Consider doing that maybe. YOUR EXAMPLES ARE REAALLY GREAT ! Carefully chosen to explain the core diferences. I don't recall anybody explained that better. I don't usually write comments on youtube, but you deserved it, my man!
I've been looking for this explanation years. Now that I am learning backend stuff this concept is clear thanks to you.
This video is the easiest to understand and also conveys the most information at the same time. Great video.
I just watched a bunch of videos on this topic, but everything clicked for me after watching yours. Thank you!
Very well thought. Watched many videos but got the exact explanation about the difference in your video. Thanks a lot
wow i really love how you explained the difference between a class and interface, really made it a lot simpler to understand compared to my current course in school, big thanks!
This video is beautiful.. Please make a whole series on java programming and frameworks, it would have some of the less privileged ones to actually learn and do something on their own. Thanks :)
This was a great explanation. Short but still getting all the important points in. Thank you!
Finally I'm able to understand the difference. Thank you John for your explanation. Greetings from Morocco
Absolutely fantastic. This example will help shape your understanding of Abstract methods and Interfaces, how to implement an abstract method, the differences between abstract classes and interface, and it was all done in 7:00 minutes. Very clear, very easy to understand. Thank you!
Very short clear and satisfactory explanation
Crystal clear explanation!
Thanks! This really cleared it up in my head, I was struggling to figure out why we would want to!
👏 Yes! Great explanation of this topic, John! Thank you
I just wanted to shout and rant angrily but actually that was the best explanation in 7 minutes. Clear and concise, thank you.
Simple, yet excellent explanation. Thanks!
no better way to explain it. Thank you so much John, highly appreciated.
Amazing, clear, and straight to point!
You are among the best teachers on RUclips, good job and thank you for your lessons! ❤
Needed clarification on whats the actual purpose of using an abstract class .Really simple and clear explanation for a beginner like me to follow . Thank you John !!
This is perfectly explained, no wasted time. Top notch. Thank you !
Superb Explanation. Easily understandable.
Thank you so muck for your lesson. I have stucked in a concept of abstract for so long. so now on I will consider using an abstract class in my project.
I have downloaded this video, I will listen to it at home i'm at work right now. This sounds amazing. thanks
Very clear and awesome explanation. I like you always tell the reason for these concepts
Great video bro. Appreciate this kind of tutorials. Keep it going. Hello from Kyrgyzstan 🇰🇬🇰🇬🇰🇬
Thank you John so much, I have sit in a 4 hour long lecture for these stuff but could not understand. With your explanation in 7 minutes, I totally get it. I wish the best for your channel. you have very practical example. I like it.
Great video. I was going to look up interfaces next but you saved me an extra video.
Thanks for the clear explanation.
What an awesome explanation my friend, this is why I always think there is a lot of gold free content on internet, you just gotta find it
Thanks for it! I immediately understood
man - this dude explain in 5 minutes what my lecturer has been trying to do for 50, cheers!
Thank you John, the Great Explainer.
I allways wathc spanish videos for programming, but in this case i'm amazed by your explainning form. Thanks for all your videos and for sharing all your knowlege in an easy way to understand.
Greetings from Argentina!
I have seen multiple videos on this topic and all of them were badly explained and confusing. Now I watched yours, and I am impressed how well you can explain stuff. Thank you.
The final 2 minutes totally helped me get the whole concept, thanks for enlightening me :)
This video is so clear and easy to understand, thank you!
Thanks for explaining and helping.
Thanks for the video. All the explanation of the all methods and classes are crystal clear and smooth.
I can feel the effort that was put into this video :)
Thankyou so much for helping me study for my java programming final exam !
Your ability to go into further detail and give extra examples as you did when mentioning interfaces is always brilliant.
I just found this guy and Oh my he is a Gem. His videos undoubtedly have the best, most precise, crisp information anyone will ever need. I spent hours trying to learn abstraction and polymorphism, while he did it in just 7 + 7 minutes. Can't stop stressing on how good his content is 💯
This class is absolutely nothing but clear and easy to understand .Thanks master!! From Japan who aim at being top level engineer in the future!!
john i just want to seriously say thank you for saving me. my professor is so unclear, on top of a thick accent, and i struggle in the course due to those combined. i cannot say thank you enough
Brilliant explanation John!
You seriously deserve more subscribers, your content is gold, I wish it existed when I was a student. Kudos
That tutorial was soooo gooood , i saved in my playlist. Thanks John!!!!