Question

Write a program to define class with the following specifications: 

Class name : Number
Data members/instance variables:
int n: to hold an integer number
Member Methods:
void input(): to accept an integer number in n
void display(): to display the integer number input in n.

Now, inherit class Number to another class Check that is defined with the following specifications:
Class name : Check
Data Members/Instance variables:
int fact
int revnum
Member Methods:
void find(): to find and print factorial of the number used in base class
void palindrome(): to check and print whether the number used in base class is a palindrome number or not
[A number is said to be palindrome if it appears the same after reversing its digits. For example, 414, 333, 515, etc.]

Answer 1

public class Check extends Number
{
    private int fact;
    private int revnum;
    
    public void find() {
        fact = 1;
        for (int i = 2; i <= n; i++)
            fact *= i;
        System.out.println("Factorial of " + n + " = " + fact);
    }
    
    public void palindrome() {
        revnum = 0;
        int t = n;
        while (t != 0) {
            int digit = t % 10;
            revnum = revnum * 10 + digit;
            t /= 10;
        }
        
        if (n == revnum)
            System.out.println(n + " is Palindrome number");
        else
            System.out.println(n + " is not Palindrome number");
    }
    
    public static void main(String args[]) {
        Check obj = new Check();
        obj.input();
        obj.find();
        obj.palindrome();
    }
}

import java.util.Scanner;
public class Number
{
    protected int n;
    public void input() {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the number: ");
        n = in.nextInt();
    }
    
    public void display() {
        System.out.print("Number = " + n);
    }
}