31 lines
1.0 KiB
Java
31 lines
1.0 KiB
Java
// collections/UniqueWordsAlphabetic.java
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// (c)2020 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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// Producing an alphabetic listing
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import java.util.*;
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import java.nio.file.*;
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public class UniqueWordsAlphabetic {
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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 =
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new TreeSet<>(String.CASE_INSENSITIVE_ORDER);
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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, add, addAll, added, args, B, C, class, collections,
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contains, containsAll, D, E, F, false, from, G, H,
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HashSet, I, import, in, J, java, K, L, M, main, N, new,
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out, Output, println, public, remove, removeAll,
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removed, Set, set1, set2, SetOperations, split, static,
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String, System, to, true, util, void, X, Y, Z]
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*/
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