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

Use replaceAll("[^\\w\\s\\-_]", "");

What I did was add the underscore and hyphen to the regular expression. I added a \\ before the hyphen because it also serves for specifying ranges: a-z means all letters between a and z. Escaping it with \\ makes sure it is treated as an hyphen.