Is replaceAll a regex?

The difference between replace() and replaceAll() method is that the replace() method replaces all the occurrences of old char with new char while replaceAll() method replaces all the occurrences of old string with the new string .

The replaceAll() method replaces each substring of this string (the String on which it is called) that matches the given regular expression with the given replacement. It internally uses classes like Pattern and Matcher from java. util. regex package for searching and replacing matching characters or substring.

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

Java Regular Expressions are case-sensitive by default .