This regular expression component matches any character.
This regular expression component matches only those characters listed in its set.
Abstract base class for all regular expression components.
This regular expression component matches one character.
A compiled regular expression representation.
Patternmay be used with the ternary search tree (TST) methods
entrySet. Only those entries which match the pattern are returned.
Warning: Pattern matching over a TST may result in
significant CPU usage. A pattern with wildcards first
(example: ".+xyz") will traverse the entire TST. If you must
use such patterns but you do not need to find all matching
entries, then consider using the
parameter. Once the specified number of matches are found,
the method stops the search and returns.
If you need to perform regular expression pattern matching
on text only, then use the
Do not use this package for text matching only.
If you do use pattern matching, then best to use patterns that begin with concrete values and place wildcards at the end.