Observer Design Pattern in Java

The observer pattern is a software design pattern in which an object, called the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes, usually by calling one of their methods.

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[berjaoui]

I started following your tutorials in 2017. Now i am a full stack java developer...Thank you a lot

[prasadbonam]

I can say one thing " ur examples are so Realistic easy 2 understand" keep it up Good work bro n Thank you :)

[muhammadsaleh]

You are making life easier for java developers
Love from Pakistan :)

[siddharthmohanty]

I discovered this channel a few months ago and I'm legit loving it!

[karthik-exdm]

Actually... This is the best video explaining observer pattern I've seen...

From yesterday, I've been searching for observer pattern in both python and javascript, didn't find any video that solidified my understanding. I might have watched 5-10 videos (best ones).... I was sceptical at first since this video is in java (I don't know java) but turns out java is not as difficult as its often publicized. I actually understood everything clearly since I know python and JS

Naveen's example of Youtube was on point!!! If he had not taken youtube example, I think it would have been just another observer pattern video

Java is also good!!! I'm liking the way it's written
Now I'm gonna create this in JS

[rayasamkiran]

Thanks for explaining it in lucid way. Few things I noticed..
Subscriber class ..
Channel channel = new Channel ();

This is not required... You can remove the RHS part as you are doing in setter method..
Another improvement in YouTube class is ...
Unsubscribe is called only from subscriber side but not from channel side...

[kalidindiprashanth]

Hi naveen, can you also make videos on Java memory management and how to improve performance of java applications.

[vishalsingh-djod]

I have watched multiple observer design pattern video, I must say this is the best one and more realistic. Keep it going boss..

[jilanishaik]

Easily able to understanding by giving simple examples with clear explainations. Thanks Naveen.

[BakhtyarQadri]

Your thinking way is very appreciatable.Thanks to show me this way of logic building.

[dr.venugopalrajupalem]

Wonderful explanation and the example of the Observer Pattern I have ever seen! You are my favourite Teacher. Thanks.

[aswarthanarayanareddyb]

Every time...learn new from telusko, and waiting for micro services series

[vikramkumar-miyk]

All the playlists were really very good and informative. Thanks, Navin for such wonderful content.

[sohankundu]

Please continue the series. It would be very much helpful.

[khsbangash]

Hi Navin,
Your videos and way of teaching are quite energetic. Even boring subjects you can explain with full of energy. Keep up the good work bro.
Love and prayers from Pakistan !

[gigimushi]

finaly, with your exemple i understand how to implement the observer pattern. you are the best.

[ShadowWalker]

Sir, felt great, to be honest. I was struggling with this observer pattern and now it's all a matter of examples - you've made it that easy. And one more thing, with this online studying times, this study feels much more realistic with your appearance. Otherwise, only a study video makes it boring sometimes. Thanks a lot sir.

[abdullohmaraimov]

You are GOAT teacher, your explanations are also GOAT
Thank you for such a great content, keep going!

[uma]

Quick and nice explanations that's very easy to understand - telusko learnings. From this channel, I have learnt a lot. Thanks much Navin

[subashkannan]

well explained🔥Also try to upload the other design patterns as well it will be very useful for us...!!