1. Write a method which checks if a String is a palindrome and returns a boolean value. with differing inputs for handling a Palindromic sentence.

Question

Sigiloso · Accepted Answer

"A man  a plan, a canal, Panama!" is the input and is also a Palindromic sentence

Amanaplanacanalpanama - all  characters joined. 

boolean isPalindrome(String input) {
  
  if(input.isEmpty()) {
    return true;
  }
  else {
      String palindrome = input.replaceAll("[,^$%!]", "");  
      trimWhiteSpaces(palindrome);
      int length = palindrome.length();
      for(int i = 0; i < (length/2); ++i) {
      if(palindrome.toLowerCase().charAt(i) != palindrome.toLowerCase().charAt(length-i-1)) {
        return false;
      }
    }
    return true;

  }
}

String trimWhiteSpaces(String s) {

  String inputWithNoSpaces = s.replaceAll("\s","");
  char[] inputStringArray = s.toCharArray();
  StringBuffer inputStringBuffer = new StringBuffer();
  for(int i = 0; i < inputStringArray.length; ++i) {
    if(inputStringArray[i] != '' && inputStringArray[i] != '	') {
        inputStringBuffer.append(inputStringArray[i]));
    }
  }
}

This is was my solution, with a minor bug and it worked when traced.

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