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UML Class Diagram Tutorial

admin by admin
June 2, 2020
in Game
30
UML Class Diagram Tutorial



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:

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Comments 30

  1. Rob Torok says:
    2 years ago

    Such a great intro to the topic. I show this to my CS students every year. Thanks so much!

    Reply
  2. MOHAMED SABTHAR says:
    2 years ago

    the animal class has private attributes and methods so the child classes can't access theses attributes and methods, I think the attributes in the animal class should be changed to protected or else, need to implement some public get & set methods in the animal class in order to access the attributes via base classes.

    Reply
  3. Angry Gamer says:
    2 years ago

    You are amazing dear, i understood UML thanks to you! Σε ευχαριστώ! (Thank you in English)

    Reply
  4. Akshay Adatharoth says:
    2 years ago

    nice explanation

    Reply
  5. Trycryptos says:
    2 years ago

    Very concise & precise !

    Reply
  6. Jenni Sander says:
    2 years ago

    Thank you Lucidchart. Thank you Zach. Instead of having to follow some multi-staged online class, this makes it very concise and very understandable.

    Reply
  7. Jihan Citra says:
    2 years ago

    thanks!
    love from indonesia

    Reply
  8. Rursus says:
    2 years ago

    Animals aren't what programmers use to create classes for. Neither are cars, boats nor amphibious cars. Furthermore: animals don't use to have names, nor ID:s, they just exist. The only sane examples of inheritance that aren't technical I've ever heard about are geometrical shapes, where circumference and surface is fully dependent on the kind of shape, and quantity versus per-item wares from a warehouse, where the quantity bought has different types.

    Reply
  9. deki satria says:
    2 years ago

    i dont know if this comment will be replied or not. but i have a question.
    how did we define a class? and how did we define a class as abstract class, from your example, animal treated as abstract class but not the user class. why ?
    thanks if some one replied to this question

    Reply
  10. Vaijinath S says:
    2 years ago

    This video was very good. I never comment but this time could not resist

    Reply
  11. SeppuKun says:
    2 years ago

    Packages must be akin to assemblies in c# and use the internal keyword. Is there a language that uses package as a keyword?

    Reply
  12. Anders Øyvind Urke-Sætre says:
    2 years ago

    I feel the same as Brad Hleronymus expressed it. "Let's ask youtube for a quick 101 on the subject", et voilá, this one showed up on top. Clever Lucidchart stunt.

    Reply
  13. Hoeglund says:
    2 years ago

    Amazing tutorial!

    Reply
  14. Mumtaz Irteqa Ahmed says:
    2 years ago

    👏👏👏👏👏👏👏

    Reply
  15. castian says:
    2 years ago

    okay, I have to make the class diagram of my university project, it's a "collaborating software".
    I have a question, I don't know if the class diagram of my project has to focus on how works the different modules and what actions I can do in these or how the persons that work on my software unfold on it.
    Please, somebody can help me whit my question.

    Reply
  16. krishna kandula says:
    2 years ago

    Awesome tut

    Reply
  17. Alex Melillo says:
    2 years ago

    4 hours of lectures to explain what this video did in 10 mins. Fantastic.

    Reply
  18. Rodrigo Silva says:
    2 years ago

    perfeitoooo

    Reply
  19. Reece Taylor says:
    2 years ago

    Super informative. And now to go make one for uni

    Reply
  20. Quasiker says:
    2 years ago

    Huh, I already knew this channel from their funny animal diagram videos. Now I was searching for a tutorial for my CS class and they suddenly popped up. Very surprised… great explanation though!

    Reply
  21. Carl Meyrick Cheng says:
    2 years ago

    Thank you for making this easier for all of us to understand! Keep it up!

    Reply
  22. Mr. Marcial Glori says:
    2 years ago

    0.75 still fast. Just kidding. ☺️

    Reply
  23. Sanket Patel says:
    2 years ago

    Superb video.. He explained UML diagram clearly and really fast.. it saved my time.. I would have spent 2 hours reading about it… One video is worth 20 pages of reading…

    Reply
  24. Drean says:
    2 years ago

    can you please make a video about UML navigation diagram example ? it looks the same as class diagram

    Reply
  25. galloe says:
    2 years ago

    When you get to the part where it sounds like he says "This arrow tells us that customer is a child abuser," and you expect to see this in the comments, you know people are paying attention and actually watching the entire video. Good job! lol

    Reply
  26. Johnson Akanbi says:
    2 years ago

    Excellent!

    Reply
  27. dunno says:
    2 years ago

    This helped me a lot. Thank you.

    Reply
  28. Byte Size Unity says:
    2 years ago

    My professor is absolute horse shit and you taught what was basically 3 lectures worth of material in ten minutes. Thank you so much! I appreciate how fast and concise this video was designed.

    Reply
  29. pw says:
    2 years ago

    very well explain Sir

    Reply
  30. zree radical says:
    2 years ago

    Fantastic quick video to understand UML – five start ***

    Reply

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