The regex specifies two capturing groups: number 1 is (Java( language)2), which matches Java language language, and number 2 is ( language), which matches a space character followed by language.

The Java pattern-matching engine and backtracking The java.util.regex package uses a type of pattern-matching engine called a Nondeterministic Finite Automaton, or NFA.

This repo is a simple developer's aid in building and testing regex, implemented in Java. You would use this if you want to build your own regular expressions, and test them rigorously against a large ...

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 ...