/*
 * File: Palindrome.java
 * ---------------------
 * This file determines whether a string is a palindrome, which
 * is simply a string that reads the same backwards and forwards.
 *
 * Author: CS1MD3, Nov. 2008
 */

import acm.program.*;

public class Palindrome extends ConsoleProgram {

   public void run() {
      println("This program tests whether a string is a palindrome.");
      while (true) {
         String str = readLine("Enter a string: ");
         if (str.length() == 0) break;
         if (isPalindrome(str)) {
            println("That string is a palindrome.");
         } else {
            println("That string is not a palindrome.");
         }
      }
   }

/**
 * Checks whether a string is a palindrome
 * @param str The original string
 * @return The reversed string
 */

   private boolean isPalindrome(String str) {
      return str.equals(reverseString(str));
   }

/* Returns a string with the characters reversed */
   private String reverseString(String str) {
      String result = "";
         for (int i = 0; i < str.length(); i++) {
         result = str.charAt(i) + result;
      }
      return result;
   }

}