Java Object

Composition might be considered as subclassing’s alternative.

Composition :

• is simply implemented by all call forwarding to object field.
• consists of zero dependence upon the object field’s implementation details.
• is considerably much more flexible, as it is dynamically defined at the runtime instead of compile time

Subclassing issues are :

• Encapsulation is violated since the implementation of subclass & superclass gets tightly

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Tags: composition, subclassing

Categories

Composition