Hi friend,

Code to help in solving the problem :

import java.io.*;
class Plaindrome
{
public static void main(String[] args)
{

String string = "";
InputStreamReader input = new InputStreamReader(System.in);
BufferedReader reader = new BufferedReader(input);
// read in user input
boolean bool=false;

do{
try
{
System.out.println("Please enter 5 digit number.");
string = reader.readLine();
}
catch(Exception e){}
int num=Integer.parseInt(string);
int rev=0;
int rem=0;
int n = num;
while(n!=0)
{
rem=n%10;
rev=rev*10+rem;
n/=10;

}
if(num!=rev)
{
System.out.println("Please enter again valid number");
bool=true;
}
else
{
System.exit(0);
}
}
while(bool);
}
}

Thanks

Hi Friend

This is the full code according to your full requirement.

// Code Starts

import javax.swing.*;
import java.awt.event.*;

public class Pallindrome{
public static void main(String[] args){
JFrame frame = new JFrame("Calculate Pallindrome");
JButton button = new JButton("Calculate Pallindrome");
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
String str = JOptionPane.showInputDialog(null, "Enter some number : ", "", 1);
if(str.length() <= 4){
JOptionPane.showMessageDialog(null, "You have entered a " + str.length() + " digit number.", "Calculate Pallindrome", 1);
} else {
int num = Integer.parseInt(str);
int n = num;
int rev=0;
for (int i=0; i<=num; i++){
int r=num%10;
num=num/10;
rev=rev*10+r;
i=0;
}
if(n == rev){
JOptionPane.showMessageDialog(null, "Number is pallindrome", "Calculate Pallindrome", 1);
}
else{
JOptionPane.showMessageDialog(null, "Number is not pallindrome", "Calculate Pallindrome", 1);
}
}
}
});
JPanel panel = new JPanel();
panel.add(button);
frame.add(panel);
frame.setSize(400, 400);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}

// Code Ends

Thanks and Regards
RoseIndia Team