Can we create class inside class?

In Java, it is possible to define a class within another class , such classes are known as nested classes. They enable you to logically group classes that are only used in one place, thus this increases the use of encapsulation, and creates more readable and maintainable code.

You may call a public member method of a class if you have an instance of it, from another class. The easiest way is to pass the object into your function as a parameter. You may call a public member method of a class if you have an instance of it, from another class.

Explanation: The nested class can be declared with any specifier , unlike the outer classes which can only be declared public or package private. This is flexibility given for the nested class being a member of enclosing class.