// streams/TreeSetOfWords.java

// (c)2016 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://mindviewinc.com/Books/OnJava/ for more book information.

import java.util.*;

import java.nio.file.*;

import java.util.stream.*;

public class TreeSetOfWords {

public static void

main(String[] args) throws Exception {

Set<String> words2 =

Files.lines(Paths.get("TreeSetOfWords.java"))

.flatMap(s -> Arrays.stream(s.split("\\W+")))

.filter(s -> !s.matches("\\d+")) // No numbers

.map(String::trim)

.filter(s -> s.length() > 2)

.limit(100)

.collect(Collectors.toCollection(TreeSet::new));

System.out.println(words2);

}

}

/* Output:

[Arrays, Collectors, Exception, Files, Output, Paths, Set,

String, System, TreeSet, TreeSetOfWords, args, class,

collect, file, filter, flatMap, get, import, java, length,

limit, lines, main, map, matches, new, nio, numbers, out,

println, public, split, static, stream, streams, throws,

toCollection, trim, util, void, words2]

*/