32 lines
1.0 KiB
Java
32 lines
1.0 KiB
Java
// streams/TreeSetOfWords.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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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
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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,
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Set, String, System, TreeSet, TreeSetOfWords, args,
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class, collect, file, filter, flatMap, get, import,
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java, length, limit, lines, main, map, matches, new,
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nio, numbers, out, println, public, split, static,
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stream, streams, throws, toCollection, trim, util,
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void, words2]
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*/
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