//CS5-HMC-Sp.,00-HW13-1
//A. Khakpour, Apr., 00

public class PalindromeTester1
{
   //  Creates a PTester object, and tests strings.
   public static void main (String args[])
   {
      PTester tester = new PTester();
      String str;
      System.out.println("Enter a potential palindrome: ");
      str = Keyboard.readString();     
      System.out.println ("Is this a palindrome? " + tester.ptest(str));
   }  
}  

class PTester
{
   //  Uses recursion to perform the palindrome test.
   public boolean ptest (String s)
   {
      boolean result = false;

      if (s.length() <= 1)
         result = true;
      else           
         if (s.charAt (0) == s.charAt (s.length()-1))
            result = ptest (s.substring (1, s.length()-1));

      return result;
   }  
}