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This is a class diagram
UML Diagrams
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Jack Herer
105
Reputation points
These are some basic types of uml diagrams.
I'm here to help you guys. If you need anything, comment below.
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Jack Herer 105 Reputation points
2023-05-15T20:25:19.8566667+00:00 Types of multiplicities:
1 - There will be only one class
1..* - One-to-many: Infinitely possible classes
0..* - One-to-many nullable: There will be none or 1 or infinitely possible classes
0..1 - Zero to one: Possibility (either the class will exist or not)
n - Specific number of classes that will exist
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Jack Herer 105 Reputation points
2023-05-15T20:28:41.5833333+00:00 Types of UML relationships
At the instance level:
Dependency - A class is dependent on another. Dependency - Dependency is a dependency on the dependency.
Association - The classes have some relationship with each other. Simple line
Aggregation - A special type of association, says that a class can be part of another, but does not have to. Blank diamond
Composition - A child cannot exist without a parent. Full diamond
At the class level:
Inheritance - A class inherits from another. Blank arrow to the class from which it inherits.
Implementation - The class implements from the interface
Dependency - The class is dependent on the other. Open arrow
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Jack Herer 105 Reputation points
2023-05-15T20:12:21.86+00:00 -
Jack Herer 105 Reputation points
2023-05-15T20:15:26.49+00:00 This is a state diagram. A state diagram is a way of graphically writing the evolution of a system that has a finite number of states
Such a system can be a finite automaton (state automaton) or other similar systems that express the states of a certain object and the transitions (transition function) between them.
The diagram provides a set of elements to describe the behaviour of a system that is expressed by a transition of states and is controlled by an external input.
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Jack Herer 105 Reputation points
2023-05-15T20:19:44.0633333+00:00 This is a sequence diagram A sequence diagram shows us how objects in the application or classes in the code interact with each other captures the temporally ordered sequence of messages sent between objects most often shows the interaction of several sample objects within a single use case
It consists of two types of objects: Actor - Stickman symbol Object - Rectangle. Objects are placed in sequential order from right to left The individual processes or objects involved in the described use case are placed at the top of the diagram Lines (lifelines) run downwards from them to show the passage of time Between the lines, horizontal arrows of different types are drawn to represent messages sent between objects, solid arrows indicate a call, dashed arrows indicate a response, and oblong rectangles on the vertical lines indicate the time it took to process a given message or wait for a response Don't forget the alternative messages (rectangle where the situation is 2 scenarios)
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Jack Herer 105 Reputation points
2023-05-15T20:23:11.7533333+00:00 This is a Use Case diagram
The use case diagram captures an external view of the system being modelled and thus helps to reveal the system boundaries and serves as a basis for range estimates
It consists of 3 parts:
Actor - User System Boundary - the boundaries of the system, the program itself. UseCase - the usage scenario line with an open arrow - include (pay attention to directions) - right to left (mandatory to include in the scenario), right to left - extend (optionally extends)
the diagram always needs a document that verbally describes the project
It is a sequence of related transactions between a participant (usually a user in a specific role, but also another system) and the system during a mutual dialogue
The main purpose is to capture the actors who interact with the system and the relationships between the services and those to whom they are provided, in both visual and textual form