15) Java instanceof and downcasting | Java with Ali

Pubblicato il: 22 aprile 2020
sul canale di: Java with Ali

127

We use the keyword instanceof and downcast the basepluscommissionemployee and casting operator.

REMEMBER:
API - Application Programming Interface. DAU - Define, Assign, Use. IDE - Integrated Development Environment. Composition design = more flexibility Inheritance uses the keywords extends (like it extends your family by inheriting members of the superclass into the subclass), super and override. SSI - Sequence, Selection, Iteration... LIFO - Last In, First Out and more acronyms to follow!
Access modifiers:
The 3 P's - for access modifiers Private, Public and Protected. We can use protected to allow a subclass access to a superclasses members but this is not recommended as it gives access to all classes within that package AND it allows direct access to manipulate the data of the superclass.

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