ClassDeclaration
A class declaration is a language construct used to introduce a new class type. It specifies the class name, optional type parameters, and, where supported, its place in an inheritance hierarchy and the interfaces it implements. The declaration defines the class’s structure and behavior and serves as a blueprint for creating objects.
Most languages support modifiers such as public, private, or protected, plus modifiers like abstract or sealed/final.
The class body contains member declarations, including fields or properties, constructors, methods, events, and nested types.
Semantics: abstract classes may declare abstract members and cannot be instantiated; sealed/final classes cannot be subclassed;
Language variants illustrate differences. Java/C#: public class Person extends LivingBeing implements Serializable { private String name; public
In all forms, a class declaration serves to define a comparable object type, its visibility, inheritance relations,