Can someone plz explain in what cases do we want to use inner classes?

Answer 1

This example can help you understand the need of an Inner class.

Class Bank {
int name;
int unique_bank_id;

private Class AccountDetails {
int confidential_info;
int amount;
}
}

The class Bank has an inner class AccountDetails. The inner class can access all the members of its outer class but it cannot be accessed from any outside class.

Answer 2

this inner class is very use full for making cms desktop apps