The Observer Pattern Explained and Implemented in Java | Behavioral Design Patterns | Geekific

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In this video, we break down, define and implement in Java the Observer Behavioral Design Pattern.

Timestamps:
00:00 Introduction
00:07 What is the Observer Pattern?
01:24 Simple Observer Example
02:56 Observer Pattern Implementation
04:46 The Observer Pattern Class Diagram
06:08 Recap
06:39 Thanks for Watching!

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Such high quality videos! So unfair for them to have so few views :(

rapidreaders

Thank you publisher. Humble respect from your subscriber.

vengateshm

I like this video a lot as an entry point to the topic. Too many poeple want their specific problem solved for them by youtube videos rather than the explanation of their solution.

Keep it up!

bhthllj

4:26 The functional programming in Java is cool. I haven't used Java since the new features were introduced.

cparks

Best one I've seen so far! keep the good work up

mohamedelshwadfy

waiting for videos where you apply these patterns in real backend applications with springboot :) please 😁

khalilelemam

What about the event state ? How are the concrete EventListener supposed to know which product to notify user for ? eventType is insufficient, you either need to pass more primitive values which I am not a fan, so have a reference to a product class maybe.

cavalfou

At 02:53, we should also be having a "Listener" interface right? And EmailMessageListener will implement "Listener"?
Please cmiiw!

rohansodha

What is the difference between Observer pattern, Mediator pattern and Visitor(double dispatch) patterns?

SrinivasNirvana

Where would the store class stand in the UML?

RamiR

wow my search for suitable contains ends here

palashbawankar

Its tragic most companies didn't go past step 2...

donaldkeith

What’s the dotted lines and the solid lines in the class diagram?

KhushiMotwani-xzlo

I want to ask what is similarities between Chain of responsability and Observer design patterns?

alpercanbaz

The Observer Pattern Explained and Implemented in Java | Behavioral Design Patterns | Geekific

The Observer Pattern Explained and Implemented in Java | Behavioral Design Patterns | Geekific

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