如何在不删除@符号的情况下从字符串中删除所有非字母数字字符

Question

currently using this regex: s.replaceAll("[^a-zA-Z0-9]", ""); however it removes values I need such as @ . , ! @ . , ! how can I include these in my regex so they do not get replaced with empty strings.

Cheers

Answer 1

Just add them to the regex. Note that . is a special character, so you'd have to escape it:

String newString = s.replaceAll("[^a-zA-Z0-9!@\\.,]", "");