![]() ![]() Multiplicity: This represents the number range required when connecting this class instance with other class instances. If filled in, ":type name" will appear after the attribute name The default value of the propertyĭefaultValue: default value multiplicity【aaaa】 Type: indicates the type of the attribute, such as int, long, etc. After checking, the class diagram will not change Attribute type Isleaf: Indicates whether the attribute is a leaf attribute, and whether it is a final attribute in a popular understanding. If checked, an underline will appear under the attribute final Isstatic: Indicates whether the attribute is a static attribute. Stereotype: attribute description, the performance on the class diagram is to add > before the attribute name and insert the attribute description in the middle Is it static? In the right area, the meaning of each icon is as follows:Īdd class attributes, add class operations (methods), add template class type parameters, add reception, add subclasses, add parent classes, add existing interfaces, add required interfaces,Īdd association, add aggregation, add combination, add port, add component. Double-click the class name Double-click the class name, and some control buttons will pop up: In UML, the interface is represented by a small circle with a name. Interface It is a special class that has the structure of a class but cannot be instantiated, but can only be implemented (inherited). Operations: Operation is a behavior that can be used by any instance object of a class, and operation is a member method of a class. ![]() A class can have any number of attributes or no attributes. In UML class diagrams, a class generally consists of three parts:Ī class is an abstraction of a group of objects with the same characteristics in the real world.Ĭlass name: Each class must have a name, and the class name is a string.Īttributes: Attribute refers to the nature of the class, that is, the member variables of the class. It describes the classes declared in the system, but it does not describe the behavior of the classes at runtime. The class diagram contains classes and the relationships between them. Classes are used to describe the static structure of the system.
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