Java, Check if a String is a palindrome. Case insensitive

Question

I want to write a java method to return true if a string is a palindrome.

Here is what I have so far:

String palindrome = \"...\";
boolean isPalindro         


        

Answer 1

Use the below regex, to keep even numeric characters in the Palindrome, if needed. Else, you can just remove the 0-9 from the regex.

String palindrome = "..." // from elsewhere
String regex = "[^A-Za-z0-9]";
boolean isPalindrome = palindrome.equals(new StringBuilder(palindrome.replaceAll(regex, "").toLowerCase()).reverse().toString());