package com.zetcode;

// Subpatterns are patterns within patterns. They are created with () characters.

import java.util.Arrays;

import java.util.List;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class JavaRegexSubpatterns {

public static void main(String[] args) {

List<String> words = Arrays.asList("book", "bookshelf", "bookworm",

"bookcase", "bookish", "bookkeeper", "booklet", "bookmark");

Pattern p = Pattern.compile("book(worm|mark|keeper)?");

for (String word : words) {

Matcher m = p.matcher(word);

if (m.matches()) {

System.out.printf("%s matches%n", word);

} else {

System.out.printf("%s does not match%n", word);

}

}

}

}