While there is a study guide (available from Ventus) that focuses largely on objects and their
characteristics, it will be instructive to the learner (of the Java programming language) to understand how
the concept of an object is applied to their construction and use in Java applications. Therefore, Chapter
One (of this guide) introduces the concept of an object from a language-independe nt point of view and
examines the essential concepts associated with object-oriented programming (OOP) by briefly comparing
how OOP and non-OOP approach the representation of data and information in an application. The
chapter goes on to explain classes , objects and messages and concludes with an explanation of how a class
is described with a special diagram known as a class diagram .
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