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

I answered that Groovy uses Java’s regular expression support and adds a few nifty features of its own to make regular expressions easier to apply.

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 ...