Regular expressions in Java, Part 1: Pattern matching and the Pattern class. how-to. Apr 13, 2017 22 mins. Core Java Software Development. Use the Regex API to discover and describe patterns in ...

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.

In Java, I was surprised by how close the performance was for standard regular expressions to using string primitives. String primitives took 188 ms to process the 100,000 lines. Standard regular ...