The class diagram is a central modeling technique that runs through nearly all object-oriented methods. This diagram describes the types of objects in the system and various kinds of static relationships which exist between them.
In the Unified Modeling Language, a component diagram depicts how components are wired together to form larger components or software systems. It illustrates the architectures of the software components and the dependencies between them. Those software components including run-time components, executable components also the source code components.
The Deployment Diagram helps to model the physical aspect of an Object-Oriented software system. It is a structure diagram which shows architecture of the system as deployment distribution of software artifacts to deployment targets.
Artifacts represent concrete elements in the physical world that are the result of a development process. It models the run-time configuration in a static view and visualizes the distribution of artifacts in an application. In most cases, it involves modeling the hardware configurations together with the software components that lived on. An object diagram is a graph of instances, including objects and data values.
A static object diagram is an instance of a class diagram; it shows a snapshot of the detailed state of a system at a point in time. The difference is that a class diagram represents an abstract model consisting of classes and their relationships. However, an object diagram represents an instance at a particular moment, which is concrete in nature. The use of object diagrams is fairly limited, namely to show examples of data structure. Some people may find it difficult to understand the difference between a UML Class Diagram and a UML Object Diagram as they both comprise of named "rectangle blocks", with attributes in them, and with linkages in between, which make the two UML diagrams look similar.
Some people may even think they are the same because in the UML tool they use both the notations for Class Diagram and Object Diagram are put inside the same diagram editor - Class Diagram. But in fact, Class Diagram and Object Diagram represent two different aspects of a code base. In this article, we will provide you with some ideas about these two UML diagrams, what they are, what are their differences and when to use each of them.
You create "classes" when you are programming. For example, in an online banking system you may create classes like 'User', 'Account', 'Transaction', etc. In a classroom management system you may create classes like 'Teacher', 'Student', 'Assignment', etc.
In each class, there are attributes and operations that represent the characteristic and behavior of the class. Class Diagram is a UML diagram where you can visualize those classes, along with their attributes, operations and the inter-relationship. UML Object Diagram shows how object instances in your system are interacting with each other at a particular state. It also represents the data values of those objects at that state. The OO languages influence the programming world as they model real world objects.
The strength of these three approaches is utilized by the UML to represent more consistency. This UML tutorial is made for both beginners and professionals, to help them understand the fundamental concept of UML. After completion of this tutorial, you will find yourself at a moderate level of expertise from where you take yourself to the next level. No particular skills are required as a prerequisite before starting with this tutorial. The learner must be enthusiastic about gaining knowledge of UML.
We assure you that you will not find any difficulty in this tutorial. But if there is any query, or you find any mistake, do let us know by posting it in the contact form so that we can further improve it.
JavaTpoint offers too many high quality services. Mail us on [email protected] , to get more information about given services. Please mail your requirement at [email protected] Duration: 1 week to 2 week. UML Tutorial. Reinforcement Learning. R Programming. React Native. Python Design Patterns. Python Pillow. Python Turtle. Verbal Ability. Interview Questions. Company Questions. Artificial Intelligence. Cloud Computing. Data Science. Objects can be anything having properties and responsibility.
The object is represented in the same way as the class. The only difference is the name which is underlined as shown in the following figure.
As the object is an actual implementation of a class, which is known as the instance of a class. Hence, it has the same usage as the class. Interface is represented by a circle as shown in the following figure. It has a name which is generally written below the circle. Interface is used to describe the functionality without implementation. Interface is just like a template where you define different functions, not the implementation.
When a class implements the interface, it also implements the functionality as per requirement. Collaboration is represented by a dotted eclipse as shown in the following figure.
It has a name written inside the eclipse. Use case is represented as an eclipse with a name inside it. It may contain additional responsibilities. Initial state is defined to show the start of a process. This notation is used in almost all diagrams.
Final state is used to show the end of a process. This notation is also used in almost all diagrams to describe the end.
Active class looks similar to a class with a solid border. Active class is generally used to describe the concurrent behavior of a system. A component in UML is shown in the following figure with a name inside. It seems to me it is very good idea.
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