6.5 Unified Modeling Language Class Diagrams
A class and its members can be described graphically using Unified Modeling Language (UML) notation.
Layout of a UML diagram for a class
- The top box in the UML diagram contains the name of the class.
- The middle box contains the data members and their data types.
- The last box contains the method names, parameter list, and return types.
- To indicate the data type of a field, place a colon followed by the name of the data type after the name of the field.
- To indicate return type of method place a colon followed by the method name.
- Parameters and their data types inside a method's parentheses.
- The + (plus) sign in front of a member indicates that it is a public member.
- The – (minus) sign indicates that it is a private member.
- The # symbol before a member name indicates that it is a protected member.
In Section 6.3 we designed a Rectangle class. Following class diagram represent this.
| Rectangle |
|---|
- length : double |
+ Rectangle() + Rectangle(double, double) + set(double, double) : void + getArea() : double |