October 2018
Intermediate to advanced
370 pages
9h 15m
English
Content preview from Hands-On Object-Oriented Programming with Kotlin
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Rules for function-overriding
The main advantage of function-overriding is that each class can provide its own implementation to the inherited function without modifying the superclass. This is helpful when a class has more than one derived classes. If a child class wants to replace the parent's class function with its own implementation, it is free to do that as well as use the implementation of the parent class.
There are few rules of overriding:
- The function in the parent class must be declared open
- The function in the child class must use the override keyword
- The function in the child class must have the same name as in the parent class
- The function in the child class must have the same parameters as in the parent class
- To restrict ...
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