30 lines
970 B
Java
30 lines
970 B
Java
// collections/UniqueWords.java
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// (c)2017 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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import java.util.*;
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import java.nio.file.*;
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public class UniqueWords {
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public static void
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main(String[] args) throws Exception {
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List<String> lines = Files.readAllLines(
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Paths.get("SetOperations.java"));
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Set<String> words = new TreeSet<>();
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for(String line : lines)
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for(String word : line.split("\\W+"))
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if(word.trim().length() > 0)
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words.add(word);
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System.out.println(words);
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}
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}
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/* Output:
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[A, B, C, Collections, D, E, F, G, H, HashSet, I, J, K,
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L, M, N, Output, Set, SetOperations, String, System, X,
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Y, Z, add, addAll, added, args, class, collections,
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contains, containsAll, false, from, import, in, java,
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main, new, out, println, public, remove, removeAll,
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removed, set1, set2, split, static, to, true, util,
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void]
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*/
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