30 lines
1.1 KiB
Java
30 lines
1.1 KiB
Java
// streams/TreeSetOfWords.java
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// ©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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import java.util.*;
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import java.nio.file.*;
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import java.util.stream.*;
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public class TreeSetOfWords {
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public static void main(String[] args) throws Exception {
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Set<String> words2 =
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Files.lines(Paths.get("TreeSetOfWords.java"))
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.flatMap(s -> Arrays.stream(s.split("\\W+")))
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.filter(s -> !s.matches("\\d+")) // No numbers
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.map(String::trim)
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.filter(s -> s.length() > 2)
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.limit(100)
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.collect(Collectors.toCollection(TreeSet::new));
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System.out.println(words2);
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}
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}
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/* Output:
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[Arrays, Collectors, Exception, Files, Output, Paths, Set,
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String, System, TreeSet, TreeSetOfWords, args, class,
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collect, file, filter, flatMap, get, import, java, length,
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limit, lines, main, map, matches, new, nio, numbers, out,
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println, public, split, static, stream, streams, throws,
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toCollection, trim, util, void, words2]
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*/
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