Java™ Design: Objects, UML, and Process

8.0. Notation

Let's now explore the fundamental elements present on sequence and collaboration diagrams, two of the most commonly used behavioral diagrams. This material can also be found in Chapter 3.

8.0.1. Object

An object is an instance of a class and is represented by a rectangle. An object can be named in three different ways. First, and probably most common, we can specify the class that this object is an instance of. We specify the class name, preceded by a semicolon and underlined, in the object rectangle. Second, we can specify only the object name, neglecting the class name. We do so by omitting the class name and semicolon and simply ...