Mind map
Abstract Class
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Abstract Class
Class could be abstract even if its superclass is concrete
Abstract Methods
- could exist only inside of abstract classes
- nonstatic
Constructors
- must be declared as protected
- used only by subclasses
- it is impossible to create instances of an abstract class
- must be declared as protected
Subclasses
- must implement all abstract methods declared in the abstract class
- otherwise it becomes an abstract class
- Extends <Abstract class>
- must implement all abstract methods declared in the abstract class
Can be used as data type
Could exist without any abstract method
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- Description
- Java lang (Abstract Classes & Interfaces) Mind Map on Abstract Class, created by Alex Keat on 13/01/2018.
- Created by
- Alex Keat
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