If constructing a system, it’s crucial to grasp the difference between a Top-Level Blueprint (HLD) and a Low-Level Architecture (LLD). The HLD provides a broader look, outlining the core components and their relationships . It’s directed on the “what” and “why” – what the system needs to achieve

To completely understand low-level design in Java, you must move beyond introductory concepts and explore into the intricacies of system structures, methods, and component relationships. This requires a profound understanding of Java's storage model, including unwanted collection and improvement.