Java Generics Tutorial

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[@KeepOnCoding]

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[@lindawisebear]

This is the best explanation of Generics I've seen on the internet. I loved how you started with the problem to solve, and then showed how generics is useful when tackling that problem :)

[@999loaderu]

true dat. Fell the same

[@gauravmishra8782]

True

[@KnakuanaRka]

Also, something else to add about generics: If you’re expecting some specific property of the class you put into a generic, you can write that into your generic. For example, if your class had an array of T’s that you wanted to sort, just putting MyClass will make your compiler complain that you’re doing something unsafe. This is because you can only use sort() on the array if the class T implements the Comparable interface and its compareTo() method, and there’s no guarantee someone won’t try to make it with some class Java doesn’t know how to compare or sort (like a custom one). The solution here? Write your class header as MyClass. This tells the compiler that you will only make MyClass’es with types that can be sorted. This uses “extends” as opposed to the “implements” usually used for interfaces because you’re just making a promise about the generic class, not actually implementing one, and the second T is because Comparable is also generic (so you need to say that T implements a method to compare T objects specifically).

[@eustachybakielka]

It's not because of reification of arrays?

[@KnakuanaRka]

@@eustachybakielka Not sure what you’re referring to.

[@eustachybakielka]

@@KnakuanaRka "For example, if your class had an array of T’s that you wanted to sort, just putting MyClass will make your compiler complain that you’re doing something unsafe"

[@KnakuanaRka]

@@eustachybakielka What the heck is reification of arrays?

[@eustachybakielka]

@@KnakuanaRka What is reification in Java? In the context of Java as a programming language, reification is the process by which a user program or any aspect of a programming language that was implicit in the translated program and the run-time system, are expressed in the language itself. In Java, there exist "reifiable types" that are "completely available at run time" (i.e. their information is not erased during compilation). Example: //Allocates an array of type String, so it is reified String[] aStringArray = new String[10]; //Allocates a list with no type, Java does not reify generic types List aStringList = new ArrayList();

[@philippebaillargeon5204]

I like the way you explain things: Java developers created Generics to solve a problem, so I think its pretty logical to talk about the problem before talking about the concepts that were created to solve it. Great video !

[@mastershonobi110]

Super great point(illustrate the problem to solve, before the concept). A lot of Java Channels should be taking notes!!

[@angledcoathanger]

Totally agree - it's hard to get excited about a key if you haven't seen the lock that it opens

[@abdullahmajed7554]

that was really simple i love the way you edit the video making switch between you and the code it feels so clean, thank you

[@mohannadfadhal4282]

Thank you so much, Sir. You made the explanation for generics very simplified, especially, by the style of starting with the problem first and then showing the solution! 🤩

[@deeptimonga7375]

Keep On Making such videos on Keep On Coding channel. Really Helpful !!

[@KeepOnCoding]

Thanks for watching Deepti!

[@fredericoamigo]

Thank you so much for this! I love your Java tutorials. So simple, clean and explanatory. Keep up the good work!

Wow! You explained it all so good. I finally feel like I understand this. Thank you so much. Please keep it coming.

[@delmayank]

Lounge Coding! I really liked the theme. A new touch to coding tutorials. I am your fan now. You rock! Oh! And the stuff that you covered in this tutorial is of great value. You explained it easily and flawlessly.

[@JosephGallagher]

This is the most concise and easy to understand video I've seen so far on Generics, thank you so much :D

[@philyeo]

awesome stuff. I liked the way you explained it - showing the problem first and how generics can help save the day!

[@TS-wj4im]

Dude thank you. My text book way over complicated generics. Now it all makes sense.

[@shreypatel9379]

This was the best explanation on youtube, short and concise. Thank you and keep making such videos

[@hannahc8436]

This was such a great explanation of Generics. I've been so confused about it for the past few weeks. Thank you!!

[@shagiwan]

Second year of studying Software Development in Uni and this is just the best explanation ive heard! Great job man!

[@BoetFly]

Man, thank you so much, i finally understand those generics now :D

[@IgorBeneli1014]

You're incredible you explained with 12min a concept that my professor couldn't do it with 1 hour. Keep doing this amazing job thank you so much!

[@anx007d]

Thank You very much .. after looking many videos from different sources ....... this video absolutely cleared my thoughts for Java Generics.

[@CarlosRamirez-uz7hs]

Great video man, keep doing what you do

[@ziekaman2450]

Thankyou so much. You're very talented in explaining complicated Java thingys!

[@prabhakarlal4799]

Nice and simplified explanation of a complicated topic. Thank you.

[@isah.2980]

Thank you so much! Please, keep doing videos like this!

[@LIP45GUL]

Great video, thanks for explaining so well!

[@conea6891]

I like this fast paced explanation.

[@abhijeetmokale9024]

Seriously this way of learning from the problem is amazing! Thanks Sir!!

[@AshBeastreal]

Wow this is one of the best explainer videos. Loved watching it🤩

[@19sunheart96]

Nice video! Very easy to understand explanation of the concept.

[@leonrickert4061]

Keep on man, cool teaching style

[@RubenGarciaCS]

Excellent quality! Thank you

[@himanshushukla787]

bro your java playlist is so underrated. I love it

[@PrakashVl]

This tutorial is helpful for filling the gaps in generics, thanks for explaining thoroughly.

[@89pravinb]

Thank you for creating this video! Very concise and informative

[@2010aishwary]

very nice to the point video, subbed

[@alexmedina5135]

what a good, easy, and elegant way to explain generics ... keep it up!!

[@gauravkumarsingh640]

This is legit the best video I could find to understand Generics!

[@saintfrancisbeats9639]

Dope! I am currently in an Intermediate Programming college course and they just want us to read a document. I was so lost. This clarified alot. Also it cause me to switch from Netbeans to IntelliJ IDEA hahaha

[@TKollaKid]

Great explanation - clear and helpful. Thank you.

[@kylemanley915]

Sweet tutorial, just subscribed

[@ItsTheDannyShow]

Subscribing man. You helped so much.

[@okikiomisande8732]

Awesome explaination, thank you!

[@lurkhidden9126]

Learned hella! Good looks my guy

[@aavocadoToast]

Great video! Detailed and to the point.

[@monetoast]

Exceptional video, very clear!

[@ledtargaouschi5831]

Your videos are very helpful and your teaching methods are very clear

[@olegc6209]

Awesome explanation, thanks for your help!

[@fahadtahir6]

Very informative and loved your communication style

[@Burak-cr6um]

Thank you, It was very helpful as usual.

[@tolstoievski4926]

You can also declare generic type at method scope id you're planning to use static methods (methods that are not requiring you to instantiate class to use it)

[@damyandimitrov611]

Very well explanation and approach

[@qwarlockz8017]

Nice video. You do have a great way of explaining things.

[@anithachowdary9716]

I understood the topic very well.Thank you so much Please share more videos

[@999loaderu]

really well explained m8. Appreciate it. thx

[@premalupadhyay3555]

Great and simple explanation, I like this way of teaching a lot.

[@faikyesilyaprak8761]

That was lit bro!!!! Thanks for crystal clear explanation :))))

[@tetsuorulin9009]

I love teaching to the problem. Great video and thanks!

[@wovasteengova]

This looks like it's from java, a beginner's guide. I too was confused on what generics fix but thank you for explaining it in the beginning of the video. I think you should do that to all your videos

[@chinemelumj5349]

Finally understood generics, thank you so much!.

[@williamfernandesdorante6068]

WOW' You're good at teaching code and concepts. Way to go!

[@kaifahsan8459]

Thanks for the video mate. Pretty well explained. Would be awesome if you keep making videos about core and advanced OOP concepts like this.

[@KeepOnCoding]

Thank you sir. Did you have a specific topic in mind?

[@kaifahsan8459]

Probably topics like interfaces, polymorphism, exceptions, collection frameworks etc. There's a huge Quora thread that might help you as well: www.quora.com/What-is-a-complete-list-of-topics-of-Core-Java-and-topics-of-Advanced-Java

[@KeepOnCoding]

Awesome! Thanks!

[@MrMarkjams]

This is a great video! Could you do one on Interfaces?

[@leeamraa]

correction: you should make this function type-bounded as well, like this --> "boolean absEqual(NumericFns

[@leslyp.blaise7238]

Explanation clear and concise thank you

[@morolillyshean8816]

Yes, this is the best one I found. Thanks!

[@timo_b3]

Thank you, excellent explanation!

[@nikeshparajuli6345]

it's really helpful,thanks a lot .

[@lancelotlin3459]

Best tutorial! Thanks for your explanation!

[@kalyanmatamarugu9396]

Clean, simple and perfect content!

[@chikken007]

Great explanation! Just gained a new Sub. Thank you and keep it up please!

[@earl0fBronze]

I read a thirty page chapter on this, one ear out the other. This video is outstanding, mind blown.

[@dalvandi]

Possibly one of the best, clearest, and crispest explanations on the generic class that I've seen! Keep up the great content dude!

[@ramiayash7658]

i highly agree with you, the guy is so clear with his explanations

[@irenaslavova2041]

Very helpful for me, thanks!

[@abidali5131]

Thank you, I learnt something new today

[@lazpz617]

This video really helped me understand Generics way more than my instructors classes

[@junveld4830]

Thank you, very useful! I wish you were have more views ❤️

[@bibahbibah5108]

i like the u develop the subject, uake java very easy to work with

[@sjakie0420]

Thanks, very clear explanation

[@nisarullah7734]

Great work keep it up

[@technocoh]

Amazing, simple explanation, thank you! =D

[@thomi100]

Very well explained, thanks!

[@MrDoctorSchultz]

Smooth, informative, and straight to the point. Keep up the good work!

[@tamimjabr1648]

You are awesome bro, thank you for this video

[@ritexcorp]

That was a great explanation of Generics, keep up the good work, I just subscribed to your channel. Do you have something on Java annotations?

[@gmailservice9945]

very useful and well explained. thank you

[@ravenmadd1343]

Why can't everything be explained this clearly and quickly? Thanks for doing this and keep up the good work.

[@SaljooqAltaf]

This just might be personal preference but the best and most detailed explanations for anyone studying comp sci are found in this channel - no idea why views haven't hit a million

[@himangshuchowdhary4369]

Great explanation KOC!

[@athardaif863]

I was struggeling with understanding generics until I watched your video. Thanks a lot :)

[@Officially_fit]

This guy is just amazing

[@101matthias]

I just watched 9 hours of online classes from my teacher on generics and I understood nothing. Less than nothing. 10 minutes of you and everything is clear it's super easy actually.

[@technocoh]

yeah not every professional or teacher is able to share his knowledge the proper way... ;)

[@pinolskun8764]

@@technocoh yeah if someone need 9 hours to explain a concept you can safely assume they are the first who don't understand it

[@beatakazmierczak2543]

Simply explained! Thank you!

[@cirodecarlineto2483]

Thnks for the vid sam!!

[@fernandaribeiro2231]

oh my God, thank you so much!!! you make this look easier

[@arnabmukherjee5840]

Awesome tutorial bro

[@buddhikachathuranga2968]

love the way you teach

[@shecodesthings3978]

Ah, another example of my previous compsci professors failing to teach something fairly straightforward... *facepalm* You, on the other hand, taught it in such a practical and applicable manner: Discuss a simple problem and then propose a solution (and actually working through the example) Super easy to remember too. Great video!

[@mimischly2547]

thanks man great explanation

[@porkfreegaming5278]

You are awesome! thank you good sir

[@_PrajaktaMokale]

Thank u🥰😊 awesome video 👍👍

[@netrob]

Well explained. Thanks!