Palindrome String in java programming

A Palindrome string is a string that remains same when its characters are reversed.

Example :    mom – mom   ,   madam – madam , pop – pop

import java.util.* ;

class  Palindrome

{

    public static void main(String args[])

    {

        Scanner sk = new Scanner(System.in) ;

        System.out.print("Enter ur word : ") ;

        String nm = sk.nextLine() ;

       

        String str=nm ;

       

        int len = nm.length() ;

       

        String  rev = " " ;

       

        for(int i=len-1 ; i>=0 ; i--)

        {

            rev=rev+nm.charAt(i) ;

        }  

             

        if(str.equals(rev))

        {

            System.out.println(str +" is a Palindrome ");  

        }

        else

        {

            System.out.println(str +" is a Not Palindrome ");  

        }       

    }

}