package com.zetcode;

import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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

public class JavaRegexSubpatterns {

    public static void main(String[] args) {

        List<String> words = List.of("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);
            }
        }
    }
}