Palindrome Java Program ISC 2017

A class Palin has been defined to check whether a positive number is a Palindrome number or not.

The number ‘N’ is palindrome if the original number and its reverse are same.

Some of the members of the class are given below:

Class name: Palin
Data members/instance variables:
num: integer to store the number.
revNum: integer to store the reverse of the number.
Methods/Member functions:
Palin(): constructor to initialize data members with legal initial values.
void accept(): to accept the number.
int reverse(int y): reverses the parameterized argument ‘y’ and stores it in ‘revNum’ using recursive technique.
void check(): checks whether the number is a Palindrome by invoking the function reverse() and display the result with an appropriate message.

Specify the class Palin giving the details of the constructor, void accept(), int reverse(int) and void check(). Define the main() function to create an object and call the functions accordingly to enable the task.

import java.io.*;
class Palin{
    private int num;
    private int revNum;
    public Palin(){
        num = 0;
        revNum = 0;
    }
    public void accept()throws IOException{
        InputStreamReader in = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(in);
        System.out.print("Number: ");
        num = Integer.parseInt(br.readLine());
    }
    public int reverse(int y){
        if(y == 0)
            return revNum;
        else{
            revNum = revNum * 10 + y % 10;
            return reverse(y / 10);
        }
    }
    public void check(){
        if(num == reverse(num))
            System.out.println(num + " is a palindrome.");
        else
            System.out.println(num + " is not palindrome.");
    }
    public static void main(String args[])
    throws IOException{
        Palin obj = new Palin();
        obj.accept();
        obj.check();
    }
}

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