Regular expressions in Java, Part 2: The Regex API how-to May 16, 2017 26 mins APIs Core Java Development Tools ...

The Java Tutorials ‘s lesson on regular expressions introduces Java’s support for regular expressions via the java.util.regex package and highlights the two classes Pattern and Matcher.

The Java Regex or Regular Expression is an API to define a pattern for searching or manipulating strings. It is widely used to define the constraint on strings such as password and email validation.

To use an escape sequence in a Java regular expression two back slashes have to be used like so "\\s". A quantifier is a special character or characters that specifies how many times the pattern ...

The topic of regular expressions is rich and complex, and Java's implementation of it is comprehensive. A thorough study of the package would be a significant undertaking, and we have only presented ...