Java Exercise 1: Basic Class Structure
public class first { /** * All Java classes inherit from Object. * * Reserved words (usage already defined, written in lowercase) * 1) Access modifiers: default, public * 2) class (blueprint) -> object (instance = house) * * Data types * 1) Primitive types * 2) Composite types (can be combined/modified): class, array, interface */ }Key concepts covered:
- All Java classes implicitly inherit from Object
- Reserved words vs user-defined identifiers
- Access modifiers: public, private, protected, default
- Primitive types vs composite/reference types
