how to replace multiple matched Regex

Question

I have a set of regex replacements that are needed to be applied to a set of String,

For example:

1. all multiple spaces with single space (\"\\s{

Answer 1

You have these 2 replaceAll calls:

s = s.replaceAll("\\s{2,}"," ");
s = s.replaceAll("\\.([a-zA-Z])",". $1");

You can combine them into a single replaceAll like this:

s = s.replaceAll("\\s{2,}|(\\.)(?=[a-zA-Z])", "$1 ");

RegEx Demo