Author Archives: tamusandesh99

cs@worcester – Dream to Reality 2021-09-26 23:53:59

What are UML Class Diagrams

Foremost, UML diagrams

UML stands for Unified Modeling Language and was invented by Grady Booch, Ivar Jacobson, and James Rumbaugh in 1995 while working at Rational Software. We create UML diagrams to help us comprehend the system more clearly and simply. A single diagram does not represent all aspects of the system. UML defines various kinds of diagrams to cover most of the aspects of a system. UML diagram has two categories of diagrams, Structural Diagrams and Behavioral Diagram. Inside Structural Diagrams, there is Class diagram, Object diagram, Component diagram, and Deployment diagram.

UML class diagrams

Class diagrams are the most common diagrams used in UML. Classes, interfaces, relationships, and collaboration are all represented in class diagrams. The features and activities of a class, as well as the system’s restrictions, are depicted in a class diagram. Class diagrams are often used in the design of object-oriented systems since they are the only UML diagrams that can be directly mapped with object-oriented languages.

What is Class?

A Class is an object’s blueprint. Objects and classes are inextricably linked. We can’t discuss one without discussing the other. And, because we utilize classes to generate objects, the entire objective of Object-Oriented Design is not about objects, but about classes. As a result, while a class describes what an object will be, it is not the object itself. Classes, on the other hand, specify the types of things, whereas objects are useable instances of classes. Each Object was constructed using the same blueprints and so has the same components (properties and methods). An object is a member of a class and has states and behaviors, according to the standard definition.


An example can be such as there is a base class as an animal dog and we create an instance like Bobby, which is a dog. A dog has properties such as color, eye color, height, weight. And the method example for a dog can be such as a dog can jump, can sit, can eat. And for the object which is Bobby, Bobby has property value. Bobby is a yellow color, he has brown color eye; he is 17 inches tall, and he weights 24 pounds. For the methods Bobby can jump, he can sit, can eat as well.

Why UML class diagrams?

I chose this topic because UML diagrams have always made it easier for me to understand the topic/code. It helps me figure out which classes are inherited from which, which classes are abstract, and so on. For example, a class may override a method, but with the UML diagram/markdown preview, I can easily tell where the original method was created and why I have override that method. Also, since our 1st assignment is about markdown preview and UML diagrams, why not. So far, these two websites have helped me gain a better understanding of UML diagrams.

From the blog cs@worcester – Dream to Reality by tamusandesh99 and used with permission of the author. All other rights reserved by the author.

CS Mission

Some of you may know me and some may not, but I am Sandesh Gurung and I am currently a senior at WSU pursuing a dream of becoming software developer. This is my introductory blog post for CS-343 section 2. I’m hoping to get a lot out of this lesson. It may not be easy, but it is what I most desire at the moment. As time passes, I will continue to update this blog about what I have learnt in this course. 

From the blog cs@worcester – Dream to Reality by tamusandesh99 and used with permission of the author. All other rights reserved by the author.