The underlying implementation of String::replaceAll calls the java.util.regex.Pattern.compile() method each time it is
called even if the first argument is not a regular expression. This has a significant performance cost and therefore should be used with care.
When String::replaceAll is used, the first argument should be a real regular expression. If it’s not the case,
String::replace does exactly the same thing as String::replaceAll without the performance drawback of the regex.
This rule raises an issue for each String::replaceAll used with a String as first parameter which doesn’t contains
special regex character or pattern.
Noncompliant code example
String init = "Bob is a Bird... Bob is a Plane... Bob is Superman!";
String changed = init.replaceAll("Bob is", "It's"); // Noncompliant
changed = changed.replaceAll("\\.\\.\\.", ";"); // Noncompliant
Compliant solution
String init = "Bob is a Bird... Bob is a Plane... Bob is Superman!";
String changed = init.replace("Bob is", "It's");
changed = changed.replace("...", ";");
Or, with a regex:
String init = "Bob is a Bird... Bob is a Plane... Bob is Superman!";
String changed = init.replaceAll("\\w*\\sis", "It's");
changed = changed.replaceAll("\\.{3}", ";");
