Multilevel inheritance in java ~ whereisstuff

Multilevel inheritance:

Multilevel inheritance has derived from the class itself and derives the subclass further.
It means one base class derived from the intermediate class, that intermediate class derived the derived class.

Syntax:

class a
{
         //Base class
}
class b extends class a
{
         //Intermediate class

}
class c extends class b
{
          //Derived class
}
Object creation:
Derived_class_name object_name;
object_name.function(parameter list);

Example:

import java.util.Scanner;

public class get_data //Base class

{

    int pin;

    Scanner sc = new Scanner(System.in);

    void get_value() {

        System.out.println("\n\t Welcome to XXX Bank ");

        System.out.println("Enter your pin number: ");

        pin = sc.nextInt();

    }

}

class compare extends get_data //Intermediate class

{

    void compare_data() {

        if (pin == 1234) {

            System.out.println("Your pin number is valid. ");

        } else {

            System.out.println("Your pin number is invalid. ");

        }

    }

}

class cash_withdrawal extends compare //Derived class

{

    int amt;

    int cash;

    void get_cash() {

        amt = 2000;

        if (pin == 1234) {

            System.out.println("Enter an amount for cash withdrawal: ");

            cash = sc.nextInt();

            amt = amt - cash;

            System.out.println("Your current balance : " + amt);

        } else {

           System.out.println("Please enter correct pin number...");

        }

    }

}

class Multilevel_Inheritance {

    public static void main(String args[]) {

        cash_withdrawal c = new cash_withdrawal();

        c.get_value();

        c.compare_data();

        c.get_cash();

    }

}