What do the Replace all do?

The replace() method searches a string for a value or a regular expression . The replace() method returns a new string with the value(s) replaced. The replace() method does not change the original string.

Java String replaceAll() The replaceAll() method replaces each substring that matches the regex of the string with the specified text .

replaceAll() The replaceAll() method returns a new string with all matches of a pattern replaced by a replacement . The pattern can be a string or a RegExp , and the replacement can be a string or a function to be called for each match. The original string is left unchanged.