Java program to find given number is palindrome or not

In this article we will learn to implement a Java program to find given number is palindrome or not. A Java program is provided below which reads a number and prints whether it is a palindrome or not.

A palindrome is one which is same after reversing it. For example, if you take a number like 1221, after reversing it, it is again 1221.

Following program reads a number from the user and finds out whether it is a palindrome or not:

import java.util.Scanner;

public class Driver
{	
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);
		System.out.println("Enter a number: ");
		int n = input.nextInt();
		int dup = n;
		int rev = 0;
		while(n != 0)
		{
			rev =  rev * 10 + (n % 10);
			n = n / 10;
		}
		if(rev == dup)
			System.out.println("Given number is a palindrome");
		else
			System.out.println("Given number is not a palindrome");
		input.close();
	}
}

Input and output for the above program are as follows:

Enter a number: 
1225221
Given number is a palindrome

Suryateja Pericherla

Suryateja Pericherla, at present is a Research Scholar (full-time Ph.D.) in the Dept. of Computer Science & Systems Engineering at Andhra University, Visakhapatnam. Previously worked as an Associate Professor in the Dept. of CSE at Vishnu Institute of Technology, India.

He has 11+ years of teaching experience and is an individual researcher whose research interests are Cloud Computing, Internet of Things, Computer Security, Network Security and Blockchain.

He is a member of professional societies like IEEE, ACM, CSI and ISCA. He published several research papers which are indexed by SCIE, WoS, Scopus, Springer and others.