What Do You Mean by Abstraction in Java?
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- May 03, 2025
Abstraction in Java is an Object-Oriented Programming (OOP) concept that focuses on hiding implementation details and showing only the essential features of an object or system to the outside world.
Definition: Abstraction is the process of hiding the complex internal logic and exposing only the necessary parts through interfaces or abstract classes.
- Increase code reusability and scalability.
- Separate what an object does from how it does it.
- Can have both abstract (unimplemented) and concrete (implemented) methods.
- A class implements the interface and defines the behavior.
Real-World Analogy: Think of a TV remote - You know what buttons to press to change the channel (interface), but you don't need to know how the internal circuits work (implementation).
Definition: Abstraction is the process of hiding the complex internal logic and exposing only the necessary parts through interfaces or abstract classes.
Purpose of Abstraction:
- Reduce complexity.- Increase code reusability and scalability.
- Separate what an object does from how it does it.
How Abstraction is Achieved in Java
1) Using Abstract Classes:
- Cannot be instantiated.- Can have both abstract (unimplemented) and concrete (implemented) methods.
2) Using Interfaces:
- All methods are abstract by default (before Java 8).- A class implements the interface and defines the behavior.
Real-World Analogy: Think of a TV remote - You know what buttons to press to change the channel (interface), but you don't need to know how the internal circuits work (implementation).