Write a Java Program to test the given string is palindrome or not

//AIM:  Write a Java Program to test the given string is palindrome or not

import java.io.*;

class pal
{
       public static void main(String arg[]) throws IOException
        {

int i,j,len;
String s;

DataInputStream in=new DataInputStream(System.in);

System.out.print("Enter a string ?");
s=in.readLine();
len=s.length();

                        System.out.println("Len="+len);
                       
                        for(i=0,j=len-1;i<(len/2);i++,j--)
{
if(s.charAt(i)!=s.charAt(j))
break;
}

                        if(i==(len/2))
  System.out.println("Pal string");
else
  System.out.println("Not a Pal string");

        }
}