Java Palindrome

public boolean palindrome(String string)
{
   return isPal(string, 0, string.length() - 1);
}
 
private boolean isPal(String string, int left, int right)
{
   if (left >= right)
   {
      return true;
   }
   else if (string.charAt(left) == string.charAt(right))
   {
      return isPal(string, left + 1, right - 1);
   }
   else
   {
      return false;
   }
}