🎯 1. What is a Custom Generic Class?

A generic class is a class that works with any data type, using a placeholder like <T>.

Instead of writing:

• BoxInt
• BoxString
• BoxDouble

You write ONE class that works for all.

⭐ 2. Why Custom Generic Classes Exist

Without generics:

❌ Code duplication

❌ Type casting

❌ Runtime errors

With generics:

✔ Reusable code

✔ Type safety

✔ Clean design

✔ Compile-time error checking