I’ve created the RegexDemo application to demonstrate Java’s regular expressions and the various methods located in the Pattern, Matcher, and PatternSyntaxException classes.

Our regular expression thus matches a word, followed by one or more whitespace characters, followed by a second instance of the word. The trailing word boundary sequence (\) is necessary to prevent ...

If you’ve programmed in Perl or any other language with built-in regular-expression capabilities, then you probably know how much easier regular expressions make text processing and pattern ...