October 2018
Intermediate to advanced
370 pages
9h 15m
English
Content preview from Hands-On Object-Oriented Programming with Kotlin
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Composition
Composition is an advanced form of aggregation, where two objects are highly dependent on each other. In aggression, one object contains the other object, whereas in composition, one object owns the other object. When the object that owns the other is destroyed, the object that is owned is also destroyed. In composition, an object may be composed of small objects. The human body is a good example: a person is composed of a head, arms, legs, and more. Each part of our body is a fully-working object with its own characteristics and behaviors. We can talk, listen, and see using our head, we can walk using our legs, and we can hold different objects using our hands. If a person dies, however, the objects stop working and die as well. ...
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