Regex to replace all special characters except asterisk and escaped asterisk

Question

I am looking for a regex to replace all special characters except * and \\* . This regex snippet input.replaceAll('/[^a-zA-Z0-9*]*/', '') converts all other characters except * , But I am trying to ignore \\* as well.

input.replaceAll('/[^a-zA-Z0-9*\\\\\\*]*/', '') ignores \\* but it also ignores \\ individually, I am trying to get an expression that considers \\* as a combination and replaces rest.

Answer 1

Try this expression:

(?:(?!\\\*)(?!\*)(?![a-zA-Z0-9]).)+

See the demo here: https://regexr.com/50t1o