Dependency Injection & Inversion of Control

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This week, we're going to talk about the topic of Dependency Injection in Object oriented code. We will implement a solution in Java. You don't need a fancy container to do it, it's actually quite simple to do manually! We will look at how frameworks like Spring use these principles in their dependency injection container.

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Опубликовано:

7 фев 2019

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Комментарии : 332

@TheSimpleEngineer 5 лет назад

What do you guys want to learn next?

@stephane3115 5 лет назад

everything that is not language specific (Design patterns, SOLID, etc..)

@TheSimpleEngineer 5 лет назад

@@stephane3115 Cool. I'll probably do a SOLID overview video and then separate deep dives like this one in a mini series! Thanks!

@stephane3115 5 лет назад

@@TheSimpleEngineer Sounds awesome! Looking forward to it!

@ilyasselamrani5674 5 лет назад

Dude, I just wanted to let you know that your explanation is so FREAKING awesome, I dont why you have such few views, just keep up the good work, you gonna make it. Hard luck P.S.: I would love to see some generic videos about concepts that every software engineer should know

@ishandulet4289 4 года назад

too fast, 40% not clear

@amanbhatia7442 5 лет назад

Fantastic explanation! So many DI and IOC explanations, but none of them seemed to convince my logic. Your video made the concept so easy to understand. Thanks

@TheSimpleEngineer 5 лет назад

Glad to hear!

@Ajekiy 5 лет назад

After a few hours of watching videos and reading articles, this has finally made the bulb of my brain turn on and understand exactly what IOC and DI are. The fact that you uploaded this a little more than a month before I needed it makes it even more amazing to me. Thanks a lot, buddy!

@ajay1124 4 года назад

Easily the best explanation I have seen, simple, succint and thorough - well done

@cannonkalra7133 4 года назад

This was amazing. It just explained everything I had my doubts about.

@yoshihitotuba 4 года назад

It was extremely easy to understand. It's an excellent lecture! Thank you!!

@pablogarin 3 года назад

Dude, congrats... I've watched about 10 IoC or dependency injection videos, and this is the most comprehensive one yet... Cheers!

@xIncrement 3 года назад

Very nice! Keeping it simple. I've watched multiple videos on the subject, but your explanation condensed the answer to "why", which helped me a lot to start using the principle in practice, so thanks a ton!

@kenmtb 2 года назад

This is gold. Thank you for showing your teaching skills and makings a concise no nonsense video. This is the way to learn a concept.

@ceki9900 2 года назад

I watched tutorials, read books, followed documentation, but this fit me so well. Thank you very much! People could learn a lot from you in one day a lot.

@ashanlingam312 3 года назад

you are an amazing teacher with great pace and tone of voice and you really know how to communicate important information in a simple easy to understand way. thank you!

@babnishvyas6317 3 года назад

Wow what a wrap-up! Explaining beautifully from the beginning and connecting it to Spring seamlessly! Amazing Stuff:D

@irfaanjamarussadiq5500 2 года назад

This really is the best explanation of DI and IOC I have seen yet! Your explanation was very easy to understand!

@slobodanbulatovic5300 3 года назад

By far the best use of code to explain this concept! Thank you !

@rajatverma1688 3 года назад

Lucky to find this video, whenever I need to revise DI, IoC I prefer this one, it's simple, crisp, and clear. Thanks a lot :)

@Bristerireland 4 года назад

Awesome, thanks! Something went click, finally!!! Been struggling to understand dependency injection and IoC up until now

@koushikrakib7605 3 года назад

Oh man, I watched my instructor's video 3 times, didn't get the concept. But you made me understand everything within 8 minutes. I think the way you code and shows example is really helpful. Hats off!

@appyolala Год назад

I've been searching & watching videos about DI. This is the best so far!!!? You've got a gift of teaching!!! Thank you very much!!!

@sk8leesk8 3 года назад

I've listened to other people explaining this topic. You've had the best, easiest to listen to explanation. Thanks

@dibyanshumishra3536 4 года назад

The best tutorial on Dependency injection yet! Seems to tackle every "why" regarding the topic. A suggestion: You could have had a class that creates the object(initializes database) and return the object before going into the framework section. The most perfect explanation on the internet.

@stefanoctaviansterea1266 Год назад

I can't believe I watched a lot of videos about DI and IoC in Laravel and still couldn't understand the concept and now I find your video about the same concepts in Java and it's all crystal clear out of a sudden. Your explanations were so good. Thanks a thon!

@moisescruz4499 2 года назад

The best explanation of these two very important concepts. Thank you Ryan

@jetgens 4 года назад

Dude. You blew my mind with how simple you made this.

@steambassador 4 года назад

Finally, today i have understood IoC explicitly!!! yes you are a gooood lecturer!

@malvaloca 4 месяца назад

What an amazing and clarifying explanation. Thanks you all so much!

@thegt 3 года назад

Beautiful explanation and comfortable demonstration! Thanks!

@lee38xzy 3 года назад

Awesome! Great explanation in a super short video !!

@laurentiuanghel1562 Год назад

Finally a dude that explains the basic concepts and then actually shows the practical use.. congrats my dude.

@FritsvanDoorn 3 года назад

Thank you for this explanation. I did not understand this concept until you talked about the usage of unit testing and then the quarter fell. Thank you.

@widget_wizard 5 лет назад

Thank you for this explanation. Subscribed, I hope you've got time to keep software design principal videos coming. Really good stuff.

@justincheong6159 5 лет назад

Fantastic! Now I really got a clear picture of why this principal/design is needed!

@user-hq2yx6vv2y 4 года назад

Really good explanation! Base on the problems that we met in actually programming, and then show how IoC solve these problems. Very easy to understand ioc from your tutorial

@GammaSouljah 3 года назад

Im learning C# and Dependency Injection but was confused by some of the video on youtube specifically targeting c#. I stumbled on to your video and you made the concept so Clear! Thank you!

@chrisolivier6415 4 года назад

I have to agree with most up top, really well explained, thanks and well done!

@calvinsaxon5822 Год назад

Thanks for not spending 45 minutes on an introduction at the preschool level to what the concept of "depending" means in life in general. Much appreciated. You got right into the meat while still going at a level a beginner could understand. Much appreciated.

@adeyemiblessing 2 года назад

Been watching videos about dependency injection for the last few days and I never quite understood it like you just explained. I'm really glad RU-vid algorithm listens to my wants. You just earned a sub

@riyanshbiswas 2 года назад

By far the best explanation for IOC and Dependency Injection. All other channels complicate that stuff. Much appreciated. Subbed your channel as well.

@recepcakir4866 3 года назад

This is the best and greatest explanation on all over the internet!! After spending hours trying to learn this s*it I've finally found you. Thanks a lot!!

@vincez691 3 года назад

I have spent literally years trying to find a decent video or article to understand DI. This is it right here, the explanation just makes sense

@danmaia575 4 года назад

Awesome video, very well explained. Its always been tricky to understand it but now I do. Thank you!

@crazyco95 3 года назад

This was really well done and helpful. Thank you.

@MinhalNadeem Год назад

Finally someone explained DI in a very practical and simple way. Thankss!

@alexdomenici8503 4 года назад

Straight to the point and very well done. You could also post the first 7 minutes (7:05) as a separate video and that will make an excellent introduction to the concepts of IoC and dependency injection, regardless of one's technology of choice. I'm definitely subscribing :)

@Rochal147 2 года назад

Thanks to you and your simplest examples to understand this concept.

@BabaDee08 2 года назад

This is the best video explanation for IoC, dependency Inversion principle and dependency injection. 👏👏👏✌️

@gasparottogui 3 года назад

Great video man! These are confusing concepts, which you were able to put in a simple way! Thanks for sharing!

@aposotlossourgakis8618 2 года назад

Perfect explanation! Thank you very much for this!

@abdulkhader567 3 года назад

i have been looking for a content like this for long time, a finally found here... concepts explained very much simple. thanks a lot.

@harshadmanglani1309 3 года назад

This was fantastic, the easiest explanation for DI ever!

@mattgraves3709 3 года назад

Excellent information! Thank you so much!

@soumenr2168 Год назад

This is a great DI explanation with Realtime example ! Thanks Ryan for sharing a great content. 🤟❤ Automatic dependency part is really helpful since it reduces manual dependency injection

@prabhatracherla3098 3 года назад

I don't know Java much, I just wanted to understand the principles of DI. And you nailed it. Crisp, fast, to the point. Kudos

@RankMotion 5 лет назад

Excellent explanation! Thank you!

@mitchross2852 2 года назад

Great content. Definitely subscribing. As a experienced dev I just need a quick example to follow to get the idea. A lot easier than trying to read the docs and get the point.

@timpatterson4188 4 года назад

This is an outstanding explanation, thank you.

@thedeveloper643 2 года назад

Perfect explanation for DI! Love from South Korea

@shakik19 9 месяцев назад

I was very confused with this IoC concept and watched many videos on RU-vid and nobody explained it better than you. I wish I could give thousands of likes to this video.

@j.q.6208 3 года назад

Awesomely Explained, Thank you!

@chaluri 3 года назад

Best lecture I seen about this topic.

@ayoubdkhissi Год назад

this explanation couldn't be better!! thank you

@kinowesunga563 2 года назад

Thank you so much for this wonderful lecture!!!

@sristijaiswal1013 3 года назад

After hours of wasting my time on different articles and videos, I finally understood from this video. Thanks a lot.

@nat6106 4 года назад

Top quality explanation, very clear! Thanks

@MohiuddinEbnaKawsar 8 месяцев назад

very nice clean and simple. good job

@saurabh5392 3 года назад

Thank you very much! you made it extremely easy to understand.

@apekshask3918 3 года назад

Great video!!! Answered so many questions

@procrastinator24 Год назад

nice and clean explanation! Thank you so much!

@aditiaggarwal5493 3 года назад

After spending 1.5 hours on the web, this is by far the most useful explanation of DI and IOC. Thanks a lot! Can you also cover the Java EE vs Spring vs Springboot?

@ivandrofly 4 года назад

Great explanation! Thank you

@aliraza9511 2 года назад

Men your voice is very clear, to be honest everything was just clear! very good understanding

@technovativehub8367 3 года назад

Very well explained. Thank you.

@talesrodriguesjardim5088 Год назад

AMAZING! You just turn my brain to another level. Thanks! and keep doing your videos

@TheFunStartHere 5 лет назад

Such a good explanation ! Keep going !

@juanbarman 3 года назад

thanks so much mate !!! this tutorial was sooo great !!

@eToxSuuri 4 года назад

This is gold! Thanks for the effort :)

@adeizayusuf 3 года назад

This is the best video on IOC I've seen on RU-vid.

@user-vd6tu7wf8z 4 месяца назад

Fantastic video, very well done

@janezperme9770 5 месяцев назад

Short and to the point. 😎 Thanks !

@nerminsehic4542 2 года назад

Mind blowing explanation! Thank you so much :)

@alfredrb5067 5 лет назад

Fantastic explanation, thank youuuu!!!

@ayoubelhioui2205 9 месяцев назад

Fantastic explanation, thank you so much.

@marksimpson4310 3 года назад

I watched quite a few videos before I found this gem. Thanks for keeping it simple

@jongxina3595 2 года назад

Awesome. Finally a tutorial that makes sense. Thank you!

@rajibsarker3729 3 года назад

thanks for showing the problem with constructor injection. 😊

@srch100 4 года назад

Second time I search for something that leads me to this Channel. Subscribed

@alessandroporfirio1910 3 года назад

Thank you for the video. Very helpful!

@sudhanshushakya4579 2 года назад

Great explanation! 🤩 Thanks!

@theUSpopulation 2 года назад

Thank you for this! I had to look into these for a job interview and this video is way more comprehensible than my college notes! haha

@thyagtubes 3 года назад

Outstanding explanation!

@stasantokhi6469 5 лет назад

Amazing stuff, loved it.

@rajnishtiwari1227 Год назад

Still after 3 years its most relevant video on this topic. Kudos from India.

@randomite 3 года назад

Good illustration. I liked how the debases are initialized in some global space outside the hand coded application.

@Nata_web Год назад

Thanks.Very clear explanations👍

@tzuyulk 3 года назад

Thank you! I’m a complete beginner and I was having really hard time understanding what ioc is about. Your explained it so clearly.

@kamikaze9785 3 года назад

I still don't understand i think i am dumb

@denislutov6216 3 года назад

Awesome explanation! thanks

@r_affas 3 года назад

Great video. Thanks for the effort.

@harsh2209 3 года назад

Excellent explanation!!

@okeuwechue9238 Год назад

Very helpful vid. Thnx. @8:50, the issue you introduced - of having 2 databases - can easily be resolved by employing a façade instead of DI.

@jiezou7297 4 года назад

Very good and clear explanation!

@azmirfakkri3745 3 года назад

This explanation is amazing!