oop-encapsulation

Encapsulation in object-oriented programming bundles data with methods and controls access to object internals, protecting state and invariants through information hiding to maintain data integrity and robust code.

You implement encapsulation across Java, Python, TypeScript, and C# by applying access control modifiers like private, protected, and public to restrict direct access to object internals and expose behavior through methods.

Exposing mutable collections breaks encapsulation by allowing external direct manipulation of object state. Returning defensive copies or immutable collections prevents this violation and protects internal data integrity.

Access control modifiers like private, protected, and internal protect object state by restricting direct field manipulation, ensuring state changes occur only through validated methods such as deposit and withdraw.

Encapsulation works effectively with immutability patterns in object-oriented design by preventing state modification after initialization, combining access control with immutable structures to enforce object invariants safely.

Violating the JavaBeans antipattern breaks information hiding by exposing internal fields through automatic getters and setters, bypassing validation logic and allowing direct state manipulation that compromises encapsulation.