String Index Out Of Bound Exception error
- by Fd Fehfhd
Im not really sure why a am getting this error. But here is my code it is meant to test palindromes disregarding punctuation.
So here is my code
import java.util.Scanner;
public class PalindromeTester
{
public static void main(String [] args)
{
Scanner kb = new Scanner(System.in);
String txt = "";
int left;
int right;
int cntr = 0;
do
{
System.out.println("Enter a word, phrase, or sentence (blank line to stop):");
txt = kb.nextLine();
txt = txt.toLowerCase();
char yP;
String noP = "";
for (int i = 0; i < txt.length(); i++)
{
yP = txt.charAt(i);
if (Character.isLetterOrDigit(txt.charAt(yP)))
{
noP += yP;
}
}
txt = noP;
left = 0;
right = txt.length() -1;
while (txt.charAt(left) == txt.charAt(right) && right > left)
{
left++;
right--;
}
if (left > right)
{
System.out.println("Palindrome");
cntr++;
}
else
{
System.out.println("Not a palindrome");
}
}
while (!txt.equals(""));
System.out.println("You found " + cntr + " palindromes. Thank you for using palindromeTester.");
}
}
And if i test it and then i put enter so it will tell me how many palindromes you found the error i am getting is javav.lang.StringIndexOutOfBoundException : String index out of range 0
at PalindromeTester.main(PalindromeTester.java:38)
and line 28 is
while (txt.charAt(left) == txt.charAt(right) && right > left)
Thanks for the help in advance
