Java Regex To Uppercase

Question

So I have a string like

Refurbished Engine for 2000cc Vehicles

I would like to turn this into

Refurbish

Answer 1

You could perhaps do:

String text = text.replaceAll("(?<=\\b[0-9]{4})cc\\b", "CC");

(?<=\\b[0-9]{4}) is a positive lookbehind that will ensure a match only if cc is preceded by 4 digits (no more than 4 and this rule is enforced by the word boundary \\b (this matches only at the ends of a word, where a word is defined as a group of characters matching \\w+). Also, since lookbehinds are zero-width assertions, they don't count in the match.

If the number of cc's can vary, then it might be easiest checking only one number:

String text = text.replaceAll("(?<=[0-9])cc\\b", "CC");