Manual Instantiation
Manual instantiation is a programming concept where a developer explicitly creates an object or instance of a class using a constructor or factory method, rather than relying on automatic or implicit instantiation mechanisms. It involves directly calling a class's constructor with the 'new' keyword (in languages like Java, C#, or JavaScript) or similar syntax to allocate memory and initialize the object. This approach gives developers fine-grained control over object creation, lifecycle, and initialization parameters.
Developers should use manual instantiation when they need precise control over object creation, such as in performance-critical applications where memory management is crucial, or when implementing design patterns like Singleton, Factory, or Builder that require custom instantiation logic. It is essential in object-oriented programming for creating instances with specific initial states, managing dependencies through dependency injection, or when automatic instantiation (e.g., by frameworks) does not meet the application's requirements.