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Thread: How do I make this Palindrome tester ignore punctuation?

  1. #1
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    Default How do I make this Palindrome tester ignore punctuation?

    Heres the Palindrome Tester:
    //import cs1.Keyboard;
     
    public class PalindromeTester
    {
       //-----------------------------------------------------------------
       //  Tests strings to see if they are palindromes.
       //-----------------------------------------------------------------
       public static void main (String[] args)
       {
          String str, another = "y";
          int left, right;
     
          while (another.equalsIgnoreCase("y")) // allows y or Y
          {
             System.out.println ("Enter a potential palindrome:");
             str = Keyboard.readString();
     
             left = 0;
             right = str.length() - 1;
     
             while (str.charAt(left) == str.charAt(right) && left < right)
             {
                left++;
                right--;
             }
     
             System.out.println();
     
             if (left < right)
                System.out.println ("That string is NOT a palindrome.");
             else
                System.out.println ("That string IS a palindrome.");
     
             System.out.println();
             System.out.print ("Test another palindrome (y/n)? ");
             another = Keyboard.readString();
          }
       }
    }

    How should I make this ignore punctuation?
    Last edited by helloworld922; October 2nd, 2011 at 11:56 PM.


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    Default Re: How do I make this Palindrome tester ignore punctuation?

    This is a nice reference: String (Java 2 Platform SE 5.0)

    To ignore cases.. There is a method just for that. To remove unwanted characters, you can do that as well Enjoy
    Simplicity calls for Complexity. Think about it.

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    Default Re: How do I make this Palindrome tester ignore punctuation?

    Hopefully you got the answer.

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