从字谜列表中删除括号

Question

I have problem with removing brackets

public class Main {

    public static void main(String[] args) throws IOException {
        getAnagrams(new InputStreamReader(new URL("http://www.puzzlers.org/pub/wordlists/unixdict.txt").openStream(),
                StandardCharsets.UTF_8)).forEach(System.out::println);
    }

    private static String canonicalize(String string) {
        return Stream.of(string.split("")).sorted().collect(Collectors.joining());
    }

    public static List<Set<String>> getAnagrams(Reader rr) {
        Map<String, Set<String>> mapa = new BufferedReader(rr).lines().flatMap(Pattern.compile("\\W+")::splitAsStream)
                .collect(Collectors.groupingBy(Main::canonicalize, Collectors.toSet()));
        return mapa.values().stream().filter(lista -> lista.size() > 1).collect(Collectors.toList());
    }
}

The output is

[hamster, amherst]
[genital, gelatin]

and it should be

hamster amherst
genital gelatin

Answer 1

You are just printing out your sets, you have getAngarams() that will return List of Sets of Strings, there are many ways to get raw elements without brackets, one of the possibilities is iterator:

Replace your:

getAnagrams(new InputStreamReader(new URL("http://www.puzzlers.org/pub/wordlists/unixdict.txt").openStream(),
        StandardCharsets.UTF_8)).forEach(System.out::println);

with:

 getAnagrams(new InputStreamReader(new URL("http://www.puzzlers.org/pub/wordlists/unixdict.txt").openStream(),
            StandardCharsets.UTF_8)).iterator().forEachRemaining(x -> {for (String s : x) System.out.print(s + " ");
        System.out.println();});

Answer 2

It is because forEach(System.out::println) calls the toString() method inside Set calss.

Add this method to your class

public static void println(Set<String> items) {
    for (String item : items) {
        System.out.print(item + " ");
    }
    System.out.println();
}

and replace that code forEach(System.out::println) with forEach(Main::println)

---

or by using this instead of adding new method:

getAnagrams(new InputStreamReader(new URL("http://www.puzzlers.org/pub/wordlists/unixdict.txt").openStream(), StandardCharsets.UTF_8))
            .forEach(items -> {
                for (String item : items) {
                    System.out.print(item + " ");
                }
                System.out.println();
            });