Remove special characters in the string in java?

Question

How to remove special characters in the string except \"- _\". Now I use:

replaceAll(\"[^\\\\w\\\\s]\", \"\")

it remove all special charact

Answer 1

Pattern pt = Pattern.compile("[^a-zA-Z0-9_-]");
    Matcher match = pt.matcher(c);
    while (match.find()) {
        String s = match.group();
        c = c.replaceAll("\\" + s, "");
    }

Consider this