January 2014
Intermediate to advanced
736 pages
70h 43m
English
Content preview from Android™ How to Program, Second Edition
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F.7. Composition
A class can have references to objects of other classes as members. This is called composition and is sometimes referred to as a has-a relationship. For example, an AlarmClock object needs to know the current time and the time when it’s supposed to sound its alarm, so it’s reasonable to include two references to Time objects in an AlarmClock object.
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