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Abstract
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- 1Ways to achieve AbstractionIn Java abstraction is achieved by interfaces and abstract classes
- Interface An Interface in Java is a blueprint of a class. It has abstract methods (i.e. methods without body) only.
Keyword: interface
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Abstract class
A class which has both abstract (i.e. methods without body) and non abstract methods.
Keyword: abstract - 2Few points to be noted about abstract- If a class have one abstract method then class should be abstract
- Abstract methods should be implemented in the subclass
- Cannot be instantiated using new keyword
- Subclass does not implement all abstract method then subclass should be abstract
Can use abstract class reference to achieve runtime polymorphism - 3—
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- Karteikarten am Abstract, erstellt von BLU BLU am 24/01/2025.
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