How to clear a string for regular expression

Question

I have java.lang.String that can contain any character, is there an easy way to misinform the string (for example, using an extra class that can do this?) And remove all the “dangerous” characters for later java.util.regex.Matcher or regular expression processing (e.g. $, ^, ...)?

Answer 1

you can use

 Pattern.quote(string); 

to avoid your line for regex.

Answer 2

You can also use the escape sequence \Q..\E

Here is an example of Metacharacters Inside character classes .

Any thing inside the pair \Q..\E is considered a literal.