Question

Why does this code not work?

public static void main(String[] args) {
    String s = "You need the new version for this. Please update app ...";
    System.out.println(s.replaceAll(". ", ".\\\\n").replaceAll(" ...", "..."));
}

This is my wanted output:

You need the new version for this.\nPlease update app…

Thanks for the information

Answer 1

String.replaceAll method takes Regex as first argument.

So you need to escape your dot (.), as it has special meaning in Regex, which matches any character.

System.out.println(s.replaceAll("\\. ", ".\\\\n").replaceAll(" \\.\\.\\.", "..."));

However, for your given input, you can simply use String.replace method, as it does not take Regex, and has an added advantage of that.