الانعكاس

في هذا الدرس

inspect and invoke code at runtime.

الموضوعات المخطط لها

• Class<?> gives fields, methods, constructors, annotations, and modifiers.
• Invoke with Method.invoke; read fields with Field.get (needs setAccessible(true) for private members, and may be blocked by modules).
• Frameworks use it for dependency injection, serialization, and mapping.
• Costs: slower than direct calls, bypasses compile-time checks, and can break encapsulation.
• Avoid in hot paths; cache Method objects or use MethodHandle.