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Java provides several foundational mechanisms for abstraction, encapsulation, and functional programming. Understanding how abstract classes, nested classes, wrapper types, interfaces, and lambda expressions interrelate is essential for writing robust, maintainable, and expressive object-oriented code. Abstract Classes: Blueprint with Shared Lo ...

Wrapper classes in Java serve as a bridge between primitive data types and objects by encapsulating primitive values into objects. Key aspects of wrapper classes include: Autoboxing and Unboxing: Autoboxing refers to the automatic conversion of primitive values to their corresponding wrapper objects, whereas unboxing performs the reverse oper ...