Install libregexp-java-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libregexp-java-doc
Description:
Documentation for the Regular expression library
Regexp is a 100% Pure Java Regular Expression package. Regular expressions are pattern descriptions which enable sophisticated matching of strings. In addition to being able to match a string against a pattern, you can also extract parts of the match. This is especially useful in text parsing! . This package provides the Javadoc for the regexp API.
Homepage: http://jakarta.apache.org/regexp/
Version: 1.5-4
Section: universe/java