uml diagram symbols

Class diagrams are the most commonly used diagrams in UML. We can see that class diagrams are very important. A class chart is a class digoal. The shape is very simple. It consists of a rectangle, two rectangles, or three rectangles. For example: The top column shown in is the class name. The second column is the class property. (A class can have one or more attributes. Of course, some classes have no attributes) the third column is the cl

. Proxy modeIntent: Provides a proxy for other objects to control access to this object.21. Single case (Singleton) modeIntent: Ensure that a class has only one instance and provides a global access point to access it.22. Status (State) modeIntent: Allows an object to change its behavior when its internal state changes.23. Policy (strategy) modeIntent: Define a series of algorithms, encapsulate them one by one, and make them interchangeable with each other.24. Template Method ModeIntent: Define

consistent.Just, the class involved in the association is logically a level, such as the student teacher above, but the aggregation involves the class is not a level.Look at the following example:It can be expressed as a has a/some B, at which point B is able to separate from a and exist independently. Without a car tire or a tire.Combination compositionThe composition relationship is a bit tighter than the aggregation relationshipThe limbs and the people are die.Non-separable.As for generaliza

Class digraphs are graphs describing classes, interfaces, collaboration, and relationships between them. A class diagram is a part of a static view in the system. A static view can contain many class diagrams. Static views are used for Structural Modeling of the software system. They construct the vocabulary and relationships of the system, and the visualization of structural models is achieved through class diagrams. A class chart consists of the

The previous blog summarized the use case diagram, in which the relationship between use cases is only included, because the relationship between use cases is not particularly profound. This is also because the UML use case diagram has not passed the acceptance of the master. The relationship between use cases must be further understood. This blog will summarize

Several important grasp principles: 1. Controller mode 2. Creator mode (principle) 3. Information Expert mode (principle) 4. Cohesion Poly-low coupling The pattern described here is not a design pattern for specific events in JavaSeveral operations for the main success scenario: 1.makemewsale 2.enteritem 3.endsale 4.makepayments1) Consider the interaction diagram: Refer to the contract of operation to----Our first consideration is to select the contro

UML Learning (ii)-----class diagramHttp://www.cnblogs.com/silent2012/archive/2011/09/07/2169946.htmlHttp://www.cnblogs.com/yangfengming/archive/2008/08/14/1267495.htmlHttp://www.cnblogs.com/huangxincheng/archive/2012/10/17/2728736.htmlHttp://www.cnblogs.com/playing/archive/2011/04/16/2017870.htmlHttp://www.cnblogs.com/huangxincheng/archive/2012/10/17/2728736.htmlHttp://www.cnblogs.com/goodcandle/archive/2005/10/19/UMLstart.htmlHttp://www.cnblogs.com/h

In Visio, the relationship between a package and a class is an inclusive relationship, and after the class is dragged into the folder of the package, the relationship is established, and the two-dollar correlation symbol can be set to: aggregation, composition.Interface: Hollow Circle + Straight line (Donald Duck class to achieve ' speaking ');Dependency: Dashed + arrow (animal and air relationship);Correlation: Solid + arrows (Penguins need to know the climate before migrating);Aggregation: Hol

The use case diagram mainly includes use cases, activists, and relationships. Use Cases: A description of the sequence of actions that the system, subsystem, or class interacts with external participants, including various normal sequences and error sequences. Case analysis can be considered as a decomposition of system functions. How to determine the granularity of use cases:Generally, there are no mandatory requirements for a system. You only need

Overview The relationships in a UML class diagram include: Association, aggregation, composition, dependency, generalization, and Realization) Association(Association) Line representation, optional arrows, Is a relationship in a static structure, which tends to be a data relationship. The relationships in this static structure will be stored with the storage of class files. If one class is the object of an

The concepts and symbols of dependency relations dependencies represent a class that relies on other classes in some way. When two classes are in a dependency relationship, the change of one of the classes may affect another class. Symbol: The performance of dependencies in code In program code, a dependency means that an object of one class appears in the operation of another class. There are two common scenarios in which a class takes an objec