Regex Replace All causes misses

Question

I'm working on regex in order to replace some strings

public static String removeValuesByRegex(String input, Pattern pattern, String replaceWith){
 String result;

 Matcher matcher = pattern.matcher(input);

 return result = matcher.replaceAll(replaceWith).trim();
}

Then in my test class im doing

String keywords = 'LLC|Corp|Corporation';
Pattern pattern = Pattern.compile('(?i)(?<= |^)\'|' + keyWords + '\'|(?= |$)');

String stringResult = UtilString.removeValuesByRegex('Corporation This Has a Name LLC AND CoRp ', pattern, '');

The output will come out as

oration This Has a Name AND

What appears to be happening is the regex is finding Corp in Corporation and removing "Corp" which then messed up the the Corporation comparison, is this a regex update or can I not do this approach?

Answer 1

You can use word boundaries if you want to match whole words:

String keywords = '\\b(LLC|Corp|Corporation)\\b';

Note that the \\ is necessary because source code must be escaped (this translates to a literal \b in the string, which is what the regular expression engine expects).