OnJava8-Examples/collections/UniqueWords.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// collections/UniqueWords.java

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

// Visit http://OnJava8.com for more book information.

import java.util.*;

import java.nio.file.*;

public class UniqueWords {

public static void

main(String[] args) throws Exception {

List<String> lines = Files.readAllLines(

Paths.get("SetOperations.java"));

Set<String> words = new TreeSet<>();

for(String line : lines)

for(String word : line.split("\\W+"))

if(word.trim().length() > 0)

words.add(word);

System.out.println(words);

}

/* Output:

[A, B, C, Collections, D, E, F, G, H, HashSet, I, J, K,

L, M, N, Output, Set, SetOperations, String, System, X,

Y, Z, add, addAll, added, args, class, collections,

contains, containsAll, false, from, import, in, java,

main, new, out, println, public, remove, removeAll,

removed, set1, set2, split, static, to, true, util,

void]