Big Java, Binder Ready Version: Early Objects
Big Java, Binder Ready Version: Early Objects
6th Edition
ISBN: 9781119056447
Author: Cay S. Horstmann
Publisher: WILEY
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Chapter 12.2, Problem 11SC
Program Plan Intro

Aggregation:

  • The aggregation relationship is also known as “has-a” relationship.
  • The aggregation relationship states that objects of one class contain objects of a different class.
  • Consider a quiz, which consists of questions. It can be said that the class “Quiz” aggregates the class “Question” because each quiz has one or more questions.
  • In the UML notation, a line with a diamond-shaped symbol attached to the aggregating class denotes aggregation

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