* directory. * The working directory is the location in the file system * from where the java command was invoked. */// shutdown commandprivatestaticfinal StringSHUTDOWN_COMMAND="/SHUTDOWN";// the shutdown comm
UML Use Case Diagram Tutorial Object Diagram Tutorial UML Activity Diagram Tutorial What is Unified Modeling Language UML Class Diagram Tutorial Component Diagram Tutorial UML class diagrams are essential for explaining and documenting systems. No matter how complex the process you're diagramming may be...
In particular, the interaction of bank customers with an automated teller machine (ATM) can be represented in a Use Case diagram. Before the software code for an ATM, or any other system design, is written, it is necessary to create a visual representation of any object-oriented processes. ...
There are the shapes and symols used in UML package diagrams, from which you can see clearly the elements needed in a UML diagram. A package is represented by a rectangle with a small tab on the left side of the top of the rectangle. If the members of the package are not inside th...
A principal is represented by the java.security.Principal interface. Its implementation in Catalina is the org.apache.catalina.realm.GenericPrincipal class. A GenericPrincipal must always be associated with a realm, as shown by the two constructors of GenericPrincipal: 一个principal(主体)由java.secu...
When an object is destroyed (removed from memory), an X is drawn on top of the lifeline, and the dashed line ceases to be drawn below it ... A message sent from outside the diagram can be represented by a message originating from a filled-in circle (found message in UML) or from...
In Catalina, a realm is represented by the org.apache.catalina.Realm interface. The most important methods are its four authenticate method overloads: 在Catalina 中,领域由org.apache.catalina.Realm接口表示。 最重要的方法是其四个authenticate方法的重载: public Principal authenticate(String username, Stri...
A use case model is commonly expressed using UML. In these visualizations, there are three main components: the system, the actors, and the use case. The system is represented by a rectangle or “boundary box.” Actors are shown as stick people outside of the boundary box, while the use...
Patterns. The developers in Contoso, Ltd often build Web sites, and design the navigation scheme using UML class diagrams. Each Web page is represented by a class, and associations represent navigation links. The developers generate much of the code of a Web site from the model. Each Web pag...
Many relationships, such as IAssociation, are also represented by an object that can have its own properties. If you delete an element from the model, any relationship in which it takes part is automatically deleted, and the property at the other end is updated. ...