What do you mean by data encapsulation in Java?
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- May 03, 2025
Data encapsulation in Java is one of the fundamental principles of Object-Oriented Programming (OOP). It refers to the practice of hiding the internal details of a class and restricting direct access to some of the object's components.
Definition: Encapsulation is the process of wrapping data (variables) and code (methods) together into a single unit (a class) and restricting access to the internals by using access modifiers.
🎯 Goals of Encapsulation:
· Data hiding: Prevents external classes from directly modifying internal variables.
· Controlled access: Provides public getters and setters to read/write private variables.
· Maintainability: Makes the code more modular and easier to maintain or change.
· Security: Prevents unintended interference and misuse of the data.
· 'name' and 'salary' are private — cannot be accessed directly from outside the class.
· Getter and setter methods allow controlled access to those variables.
Real-World Analogy: Think of a capsule (like a medicine pill) - the contents are protected inside, and you only get access to them in a controlled way.
Definition: Encapsulation is the process of wrapping data (variables) and code (methods) together into a single unit (a class) and restricting access to the internals by using access modifiers.
🎯 Goals of Encapsulation:
· Data hiding: Prevents external classes from directly modifying internal variables.
· Controlled access: Provides public getters and setters to read/write private variables.
· Maintainability: Makes the code more modular and easier to maintain or change.
· Security: Prevents unintended interference and misuse of the data.
· 'name' and 'salary' are private — cannot be accessed directly from outside the class.
· Getter and setter methods allow controlled access to those variables.
Real-World Analogy: Think of a capsule (like a medicine pill) - the contents are protected inside, and you only get access to them in a controlled way.