UML class diagrams

We've updated our video!
Learn how to make classes, attributes, and methods in this UML Class Diagram tutorial. There's also in-depth training and examples on inheritance, aggregation, and composition relationships.
UML (or Unified Modeling Language) is a software engineering language that was developed to create a standard way of visualizing the design of a system. And UML Class Diagrams describe the structure of a system by showing the system’s classes and how they relate to one another.
This tutorial explains several characteristics of class diagrams. Within a class, there are attributes, methods, visibility, and data types. All of these components help identify a class and explain what it does.
There are also several different types of relationships that exist within UML Class Diagrams. Inheritance is when a child class (or subclass) takes on all the attributes and methods of the parent class (or superclass). Association is a very basic relationship where there's no dependency. Aggregation is a relationship where the part can exist outside the whole. And finally, Composition is when a part cannot exist outside the whole. A class would be destroyed if the class it's related to is destroyed.
Further UML Class Diagram information: www.lucidchart.com/pages/uml-...
--
00:00 Introduction
00:20 Class
01:08 Attributes
02:06 Methods
03:05 Visibility
4:04 Zoo system example
4:29 Lucidchart
04:59 Inheritance
06:22 Abstraction
06:55 Association
07:15 Aggregation
08:00 Composition
08:46 Multiplicity
09:37 Real-world example
12:06 Conclusion
--
Learn more: training.lucid.co
Sign up: www.lucidchart.com
Follow us:
Facebook: / lucidchart
Twitter: / lucidchart
Instagram: / lucidchart
LinkedIn: / luci. .

[@Msnadine10]

My professor couldn’t explain what you just made crystal clear in 10 mins throughout 10+ hours of lectures. THANK YOU!

[@zhuhongda2000]

which school u from girl

[@Jacob-hr2vf]

I don’t believe that tbh.

[@donaldkeith139]

10+ hours? seriously?! I find that very hard to believe a professor would spend *that* much time in UML

[@LucasVitorFonseca]

I bet your professor "cut down" the trees so he could pave the road.😀

[@ColbySmith-qt4hx]

@@donaldkeith139I wouldn’t be so sure about that. I’m currently living through it

[@garyc1023tube]

I used to be a professional trainer and consultant in object-oriented analysis and design with UML. And I was a product manager for UML modeling tools. I found this video to be extremely effective in describing how many of the basic OO concepts apply in UML class diagrams. Very impressive!

[@danielhegyi5037]

The only video you ever need to watch about UML diagrams. Great job.

[@eliasreyes6075]

hands down the best animation and explanation I've seen, clear and straight to the point. amazing animation and it matches what the narrator is saying, phenomenal.

[@sakarienuh6293]

I wish this man could present every tutorial that i will ever need. he makes it so easy to understand. thanks man

[@wubishetzerihun]

you are really the best, easy and clear illustration.... everything is now clear for me! thank you.

[@Sakina819]

two semesters and today is the day I understood class diagrams Thank youuuuu

[@biniyammarkos3852]

made it super easy, It is impossible to get bored while watching you thanks man!!!

[@ibrahimomar5228]

you are the best tutor I have ever listened to 👌💯

[@user-xb1jf2qg8s]

You are da best. last of the video fixed most of my confusions about UML diagram.

[@salihabulut1855]

simplest and most comprehensive explanation, thanks

[@eliezetotero]

damn bro you were the only one who explained this on point and simply; with the zoo example and pictures bro you are genius. consider to be part of university faculty....now i understand this thanks to you 7 starssss !!!

[@roshanafernando2443]

woow very precise clear, explanation. After watching so many and after the exams here I found you. I am still glad I found the video to learn it precisely. Thank u

[@user-tb5xj1yt6t]

thank you for the effort in making the concept so easy to understand.

[@Bedni87]

thank you Mr Bear, very energetic joyful and simply served video!

[@carljohnson5836]

Clear illustrations.Nice. Looks like a channel with million+ subs

[@brianfandy]

very clear illustration. easy to understand. thank you

[@jonathanantonio5548]

Nice and clear explanation.. it help me a lot cause im a slow learner. This one is easy to understand. Thanks a lot!!

[@bontlephello5313]

U guys explain complex things so easily..thank u

[@ragingbullzei8162]

Amazing tutorial !!!! Clear explanation Thank you !

[@zhyakoxalid6892]

Thank you man so much for explaining class diagrams in such an easy way

[@ruvinduamararathna]

Best explanation for Class Diagram, Thank you very much

[@PrithaMajumder]

Thank You So Much for This Amazing Lectures 😁

[@LyTu-xw7od]

great video Mr. Lucid, it's really beautiful and coherent. Thank you.

[@Wanted4havingfun]

Mashallah brother youre the best i needed this for an exam tomorrow, lets see how it goes

[@ethanwasme4307]

only allah is the best 🙏🙏

[@zafer5695]

@@ethanwasme4307 Then why you wrote Allah with lowercase. It is a big sin.

[@ethanwasme4307]

sorry, i shouldn't' say such a joke@@zafer5695

[@thelmaotiono3999]

I love your video. It's so easy to understand and implement!

[@ethanwasme4307]

is there a mode for describing your methods? or do you just have to name them well?

[@aleksja83]

The best tutorial video ever!

[@nencodes]

Excellent and concise explanation!!

[@laurafolk3182]

I watched the video that was recommended to me by my instructor, and I will say it was very helpful and very well done. I have a question though and that is because I am not familiar with Lucid Software so I don't know in what section of it do I go to in order to drag the diagrams over so that I can add to them what I need to?

[@snaker90]

So clear and useful, thank you!

[@rieth5811]

You explained it wonderfully 😍 I can understand with once go Thank you so much for your video!

[@luciekopecka7973]

Brilliant explanation! Thank you

[@fight_fire_with_fire]

the class diagram is a really great tool!

[@sankhabimsaraambeypitiya5415]

Wow. Best explanation ever!

[@kb9996]

You explained that so well, thank you so much

[@etersven]

Thank you for making it easy to understand!

[@jasonloh9641]

perfect explanation, good animation, thank you

[@patriotir]

This was simply beautiful! thank you!

[@AlaricTheophilus]

Thank you for teaching. :)

[@sarkist.1204]

Thank you for the awesome video, the real life use case UML is actually something I've been looking for for a long time ! Attention : The link for further UML Class Diagram information doesn't work.

[@PrinceSodhi]

Well explained relationships, thank you for sharing.

[@ignatvasil548]

thank you man! That was cleanest explonation!

[@sarahtwigg8884]

This video is very clear thank you!

[@joyyy676]

Thank you so much Bear!!! extremely helpful wish you had done real life examples for all relationships tho and talked on generalisation and dependency!! anyways great video!!! lifesaving fr!

[@mohammadalaaelghamry8010]

Great content. Thank you.

[@cfd2050]

Great video! Make me quickly know how to draw UML class diagrams.

[@memyaccount8213]

Btw protected visibility generally has 2 different meanings, depending on the language used. In some languages, the video definition applies. In some other languages, like Java, it additionally allows access to other classes in the package.

[@dinushachathuranga7657]

Bunch of thanks for nice expalanation❤❤

[@Ohykha]

I couldnt understand it in german tutorials as they tend to smartassery often but u sir did a honorable job explaining this!! Thx

[@ethanwasme4307]

that sounds painful

[@w222k2]

It is really easy to understand, thanks

[@user-rl3jh6vu8p]

Very useful for me ,thank you a lot

[@codetap1429]

great explanation, thanks

[@totgamerz856]

Very Useful video for me ,Nice work man

[@omarhassan6424]

This was awesome, thank you!

[@piyumchathuranga2727]

Super Explanation. Thanks a lot

[@laurafolk3182]

I am new to coding and learning how to do class diagrams so I have a question. My instructor recommended trying to do class diagram using Lucid Software my question is the link above for a free version of it? Or is there a link that someone can provide that even if it is not a free version that someone can recommend a plan to go with that is not too expensive? I appreciate any help you can give.

[@jithup.s4220]

Great Video! Thank you :)

[@MdWadud-vw4mr]

Great demonstration.

[@graemewatson2988]

Brilliant Bear - some man - Thoroughly enjoyed your video :D

[@oshithroshantha653]

Nice explain❤ Thank you!

[@duhanavc6773]

thank you for clear explanation. I have a question in mind. What does dashed lines mean.

[@user-bl5wq3rd6p]

it's very useful and it save my final exam

[@sandhyas162]

Very very interesting, loved it❤, thanks

[@danielramos3586]

You're the best mr Bear

[@kushdkfzz7527]

super Lucid explanation ;)

[@adem44573]

Thank you for this explanation

[@user-fc9gb5ti8t]

Amazing Video!! Thank you sm

[@leander415]

this video was very helpfull thanks man

[@neviswarren]

Very helpful. Thank you.

[@tomdriver6733]

How do I make relationshsips between classes like association, aggregation, composition and inheritance?

[@AdityaKumar-uu9ed]

dil jeet liya bhai

[@OrSNCucumber]

10:55 Quick question: Why the fields and methods of User aren't protected (#)? Shouldn't a Customer class object know its password for example (To execute updateProfile() method)? I don't understand what Customer and Administrator classes are getting from the inheritance of user. Also, Shouldn't User be Abstract? Awesome video regardless 🙂 Wish I would watch it before!

[@avrakadavra1552]

Your question is just improvement of what you're suggesting right now... User class is the account credentials of Customer and Admin class to enter the system so they are required

[@mohdaiemansaidih1158]

great explanation!!

[@kabeerjamal9518]

Really helpful, thank you

[@user-iz7ej1fn9f]

I understood only a tiny bit more than when I had a lecture about this. That being said this is probably the best tutorial about the subject.

[@kushagrachaudhary5254]

very well explained.

[@dixie-he5do]

Could you please consider doing a tutorial on deployment diagrams? It would be really helpful

[@alirezaghavanini468]

it was very usefull thank you so much 😍😍

[@alexnunez834]

pure gold!

[@mostafae3139]

i was flabbergastingly bamboozled by this stupefying explanation

[@seoulscenes]

The best video I've ever seen, you saved me😭😭thankyouu

[@mateusz3541]

You saved me from 2 hours of reading a boring UML book 😇

[@aditalware1952]

Good tutorial!

[@yashmithasuresh-zg7ho]

it was so helpful thank you

[@nabilchartouni9411]

amazing video thx

[@Eichhornchen-pincone]

Yes thank you so much , thank you this might be what I just need to diagram

[@aakashsinha9641]

wonderful video

[@vaishnavm9090]

good job man 👍

[@noahyannis2465]

Great tutorial!

[@alvaro1379]

wow dude nice pfp!

[@anshumankalra5877]

which pen is on the left side at 4:34 ?

[@vzloy]

Nice and well prepared

[@mohamedatef655]

Thank You soooooo much

[@abdulmagidelmaghbub9950]

Amazing video

[@user-fe4nd2qs1t]

awesome bro!

[@winkeymontana6673]

u r the best

[@hadilhadoula2004]

I like this video , It's amazing 🤩😁

[@user-tw7qe6pq8g]

great video .

[@michaeldebeer2720]

VERY NICE, THANK YOU

[@jonassmidt7534]

Thanks!!