1.4创建类图和打开类图 步骤:右击LogicalView, 打开快捷菜单,选择:Newà Class Diagram后,系统自动在LogicalView下增加一个项目:NewDiagram。我们在此处输入:汽车类图,如图1-6所示。 图1-6创建汽车类图 双击文本”汽车类图”,打开汽车类图模型,如图1-7所示 图1-7 汽车类图在模型窗口中打开 上图显示,LogicalView,下...
UML Class Diagram 体现 Class 之间的关系,Generalization 和 Realization,这两种非常常见,Java 编程语言对应extends 和 implements,余下的还有四种,分别是:Dependency, Association, Aggregation, Composition。 在余下的四种关系中 Dependency 是比较容易识别: They (Dependency Relationships) are not implemented with membe...
0 Association, Aggrgation and Composition in UML Diagram 4 uml class diagram - when should use usage, aggregation or association? 2 uml class diagram association 2 Class Diagram: Aggregation or Composition 0 UML Class Diagrams: Relations with elements of a collection 1 UML class diagram: A...
In a UML diagram, draw a line between the parent and child class with a filled diamond shape near the parent class. As illustrated in this example, a person has legs, a heart, and a brain. If the focal point of this diagram, the person is hurt and killed, all the composite entities...
As well as aggregation, the UML has the more defined property of composition. In Figure 5.4, an instance of Point may be part of a polygon or may be the center of a circle, but it cannot be both. The general rule is that, although a class may be a component of many other classes...
composition组合和aggregation聚合之间的区别 difference 2010-11-23 20:10 −In UML, composition is depicted as a filled diamond and a solid line. It always implies a multiplicity of 1 or 0..1, as no more than one object at a t... 拂晓风起-Kenko 0 472 <123>...
UMLModel UnblockingStack Uncomment UncommentCode Underline Undo UndoCheckBoxList UndoCheckedOutItem Undock UndoNoColor UnfreezeColumn Ungroup UngroupClause Uninstall Union UnionInternal UnionPrivate UnionProtected UnionPublic UnionSealed UnionShortcut UniqueKey UniqueKeyError UniqueKeyWarning UnitePath UnitOfMeasure...
UMLwhole-part relationshipaggregationcompositionIn object-oriented technology, some concepts are so often used that people have no doubt about their meaning (e.g. class, object, method). This is not the case when abstraction concerns lead to the use of some conceptual representations such as an ...
An example of composition is a House object contains zero or more Room objects. The state of each Room object has an influence on the House object. If the House object is destroyed, the Room objects will also be destroyed. The UML diagram above illustrates the composition association line wit...
Die UML-Diagrammdarstellung ist ein schwarzer DiamantDie UML-Diagrammdarstellung ist eine weiße Raute Arbeiten Sie mit Komposition in Java importjava.io.*;importjava.util.*;classJob{privateintpay;privateintid;publicintgetWage(){returnpay;}publicvoidsetWage(intpay){this.pay=pay;}publicintget...