The Context Diagram in Figure 1 uses the processing-container example applicationdescribed in A UML Primer. ... ('systemStop', 'setMode', 'stopBelt','isStarted') as public operations in the class ...

UML is used as a representation of the Java programming language. Using sample class and sequence diagrams, you can see how UML conveys unambiguous code-mapping information to developers.

In our third installment on UML we'll show you how to use sequence diagrams as a tool in your application development and an understanding of object interaction.