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.

Fast track your regular expressions with the help of possessive quantifiers, independent grouping, lookarounds, and the regex pattern-matching engine itself.

Do you need an example of how to use Java's UnaryOperator in a functional Lambda expression? This tutorial shows you where when and how to use the UnaryOperator interface in a function.