30 lines
1.0 KiB
Java
30 lines
1.0 KiB
Java
// collections/UniqueWordsAlphabetic.java
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// (c)2016 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://mindviewinc.com/Books/OnJava/ 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 main(String[] args) throws Exception {
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List<String> lines =
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Files.readAllLines(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, HashSet,
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I, import, in, J, java, K, L, M, main, N, new, out, Output,
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println, public, remove, removeAll, removed, Set, set1,
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set2, SetOperations, split, static, String, System, to,
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true, util, void, X, Y, Z]
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*/
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