Ever struggled to understand type casting, especially when it comes to sealed classes, final types, and disjoint hierarchies

To make it crystal clear, I explained it all using a real-world analogy: the different types of Carrefour shops 🏪 — from Carrefour Market to Carrefour Express to even... a Carrefour Banking App!

🟣 What is narrowing reference conversion in Java?
🟣 Why are some casts allowed, and others rejected at compile time?
🟣 What are disjoint types and how does the compiler detect them?
🟣 How do sealed, non-sealed, and final keywords impact casting logic?

If you're prepping for a Java certification or just want to finally get those type system rules — this is for you.