替换为忽略大小写

Question

I need to replace $achieved$ from a string and it should be case insensitive. Because sometimes in string from server we get $ACHIeved$ , hence it should ignore case sensitive. I am using below code.

stringWithoutFormating.replace(Constant.PROGRAM_DETAILS_ENTRY_CONTENT_FIELDS.achieved, String.valueOf(achieved));

I have tried with (?i) as well but its not working.
Can it be done with regex, if yes what should be the regex?

Answer 1

First of all, replace performs literal string replacement, and does not accept a regex as its first argument. You need to use replaceFirst or replaceAll . Next, $ is a special regex char (it matches end of string), so it must be escaped. You may use Pattern.quote for that. So, you may use

stringWithoutFormating = stringWithoutFormating.replaceAll("(?i)" + Pattern.quote(Constant.PROGRAM_DETAILS_ENTRY_CONTENT_FIELDS.achieved), String.valueOf(achieved).replace("$", "\\$"));

Here, (?i) will make the search case insensitive, Pattern.quote(Constant.PROGRAM_DETAILS_ENTRY_CONTENT_FIELDS.achieved) will turn $achieved$ into \\$achieved\\$ , and then the replacement will take place. The .replace("$", "\\\\$") performed on the replacement is necessary to escape literal $ in the replacement.