replace, replaceAll and split with a dot

public class Main {
    public static void main(String[] args) {
        String s = "a.b.c";
        System.out.println(s.replace(".", "-"));
        System.out.println(s.replaceAll(".", "-"));
        System.out.println(s.split(".").length);
        System.out.println(s.split("\\.").length);
    }
}