#39 Why You Can’t Add to (List?) in #java?

Java Generics can be confusing — and this one gets everyone at some point.
You created a ListString, assigned it to a List?, and suddenly… you can’t add() anything? 🤯

In this video, I’ll break down:

What List? actually means

Why the compiler won’t let you add("HelloWorld")
How ?, ? extends T, and ? super T affect what you can read or write
The safe alternatives and best practices

🔐 Once you understand this, you'll never fear generics again.

💬 Comment your thoughts or Java pain points below!

Видео #39 Why You Can’t Add to (List?) in #java? канала Tech with Hazem