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.

[amanbhatia]

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

[Ajekiy]

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!

[pablogarin]

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

[yoshihitotuba]

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

[ajay]

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

[laurentiuanghel]

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

[ceki]

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.

[calvinsaxon]

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.

[bal_slayer]

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

[dreamsanity]

Damn, I've been using Java for over 7 years now and I haven't fully grasped Dependency Injection/Inversion of Control until I found your video. I just discovered your channel and this video and it is very simple to understand. I think you are on par or might even be better than JavaBrains. Definitely, better than other YouTubers who teach Java technologies and tools.

[koushikrakib]

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!

[rajibsarker]

thanks for showing the problem with constructor injection. 😊

[stefanoctaviansterea]

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!

[vincez]

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

[sristijaiswal]

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

[kenmtb]

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.

[ashanlingam]

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!

[adeyemiblessing]

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 YouTube algorithm listens to my wants. You just earned a sub

[cannonkalra]

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

[MinhalNadeem]

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