Java program to check whether a number is palindrome or not

Checking whether a number is palindrome or not, is one of the earlist classic problem in programming. A number is said to be palindrome if on reversing the number, we get the same number. For example, consider the number 121, on reversing we get 121. So, it is a palindrome number. Java program to check whether a number is palindrome or not is given.

package MathUtility;

class PalinNumber
{
 boolean palincheck(int num)
 {
  int rem, div, rev=0, back;
  back = num;
  
  while(num>0)
  {
   rem = num %10;
   rev = rev*10+rem;
   num = num /10;  
  }
  if(back==rev)
   return true;
  else
   return false;
 }
 
 public static void main(String args[])
 {
  if(args.length==0)
  {
   System.out.println("No input provided");
  }
  else
  {
   int num = Integer.parseInt(args[0]);
   PalinNumber pn = new PalinNumber();
   if(pn.palincheck(num))
    System.out.println(num + " is palindrome.");
   else
    System.out.println(num + " is not palindrome.");
  }
 }
}

To compile the program

javac -d . PalinNumber.java

And to run the program

java MathUtility.PalinNumber 12321