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Questions and Answers
What is the main purpose of Encapsulation in Java?
What is the main purpose of Encapsulation in Java?
- To make data public for all classes
- To hide implementation details from users (correct)
- To limit the flexibility of the implementation
- To increase complexity of the code
How can you achieve Encapsulation in Java?
How can you achieve Encapsulation in Java?
By declaring class variables/attributes as private and providing public get and set methods
Encapsulation in Java can lead to increased security of data.
Encapsulation in Java can lead to increased security of data.
True (A)
What is the purpose of Getters and Setters in Java?
What is the purpose of Getters and Setters in Java?
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Study Notes
Encapsulation in Java
- Encapsulation is a concept that ensures "sensitive" data is hidden from users.
Data Hiding
- Data Hiding in Java involves hiding class variables from other classes, only accessible through methods of their current class.
- It hides implementation details from users and provides better management and grouping of related data.
Getters and Setters
- Getters and setters are public methods that allow access to private variables.
- Get method returns the variable value, and the set method sets the value.
- Syntax: methods start with "get" or "set" followed by the variable name with the first letter in upper case.
Benefits of Encapsulation
- Provides better control of class attributes and methods.
- Allows class attributes to be made read-only (using only the get method) or write-only (using only the set method).
- Offers flexibility, as changes can be made to one part of the code without affecting other parts.
- Increases security of data.
Disadvantages of Encapsulation
- Can lead to increased complexity if not used properly.
- Can make it more difficult to understand how the system works.
- May limit the flexibility of the implementation.
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