Example usage for java.util HashSet contains

Introduction

In this page you can find the example usage for java.util HashSet contains.

Prototype

public boolean contains(Object o) 

Source Link

Document

Returns true if this set contains the specified element.

Usage

From source file:Main.java

public static void main(String[] a) {
    String elements[] = { "A", "B", "C", "D", "E" };
    HashSet<String> set = new HashSet<String>(Arrays.asList(elements));

    System.out.println(set.contains("A"));
}

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From source file:Main.java

public static void main(String[] args) {
    HashSet<Integer> hSet = new HashSet<Integer>();

    hSet.add(new Integer("1"));
    hSet.add(new Integer("2"));
    hSet.add(new Integer("3"));

    System.out.println(hSet.contains(new Integer("3")));
}

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From source file:Main.java

public static void main(String args[]) {
    HashSet<String> newset = new HashSet<String>();

    // populate hash set
    newset.add("Learning");
    newset.add("from");
    newset.add("java2s.com");

    // check the existence of element
    boolean exist = newset.contains("Simply");

    System.out.println("Is the element 'Simply' exists: " + exist);
}

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From source file:Main.java

public static void main(String[] args) {

    HashSet<String> months = new HashSet<String>(24);

    Collections.addAll(months, DateFormatSymbols.getInstance().getMonths());
    Collections.addAll(months, DateFormatSymbols.getInstance().getShortMonths());

    System.out.println(months.contains(args[0]));

}

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From source file:metaTile.Main.java

/**
 * @param args/*w  w w.  ja va2 s .c  o  m*/
 * @throws IOException 
 */
public static void main(String[] args) throws IOException {
    try {
        /* parse the command line arguments */
        // create the command line parser
        CommandLineParser parser = new PosixParser();

        // create the Options
        Options options = new Options();
        options.addOption("i", "input", true, "File to read original tile list from.");
        options.addOption("o", "output", true, "File to write shorter meta-tile list to.");
        options.addOption("m", "metatiles", true,
                "Number of tiles in x and y direction to group into one meta-tile.");

        // parse the command line arguments
        CommandLine commandLine = parser.parse(options, args);

        if (!commandLine.hasOption("input") || !commandLine.hasOption("output")
                || !commandLine.hasOption("metatiles"))
            printUsage(options);

        String inputFileName = commandLine.getOptionValue("input");
        String outputFileName = commandLine.getOptionValue("output");
        int metaTileSize = Integer.parseInt(commandLine.getOptionValue("metatiles"));

        ArrayList<RenderingTile> tiles = new ArrayList<RenderingTile>();

        BufferedReader tileListReader = new BufferedReader(new FileReader(new File(inputFileName)));

        BufferedWriter renderMetatileListWriter = new BufferedWriter(new FileWriter(new File(outputFileName)));

        String line = tileListReader.readLine();
        while (line != null) {
            String[] columns = line.split("/");

            if (columns.length == 3)
                tiles.add(new RenderingTile(Integer.parseInt(columns[0]), Integer.parseInt(columns[1]),
                        Integer.parseInt(columns[2])));

            line = tileListReader.readLine();
        }

        tileListReader.close();

        int hits = 0;

        // tiles which we are already rendering as the top left corner of 4x4 metatiles
        HashSet<RenderingTile> whitelist = new HashSet<RenderingTile>();

        // for each tile in the list see if it has a meta-tile in the whitelist already
        for (int i = 0; i < tiles.size(); i++) {
            boolean hit = false; // by default we aren't already rendering this tile as part of another metatile
            for (int dx = 0; dx < metaTileSize; dx++) {
                for (int dy = 0; dy < metaTileSize; dy++) {
                    RenderingTile candidate = new RenderingTile(tiles.get(i).z, tiles.get(i).x - dx,
                            tiles.get(i).y - dy);
                    if (whitelist.contains(candidate)) {
                        hit = true;
                        // now exit the two for loops iterating over tiles inside a meta-tile
                        dx = metaTileSize;
                        dy = metaTileSize;
                    }
                }
            }

            // if this tile doesn't already have a meta-tile in the whitelist, add it
            if (hit == false) {
                hits++;
                renderMetatileListWriter.write(tiles.get(i).toString() + "/" + metaTileSize + "\n");
                whitelist.add(tiles.get(i));
            }
        }
        renderMetatileListWriter.close();
        System.out.println(
                "Reduced " + tiles.size() + " tiles into " + hits + " metatiles of size " + metaTileSize);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

---

From source file:eu.fbk.dkm.sectionextractor.PageClassMerger.java

public static void main(String args[]) throws IOException {

    CommandLineWithLogger commandLineWithLogger = new CommandLineWithLogger();
    commandLineWithLogger.addOption(OptionBuilder.withArgName("file").hasArg()
            .withDescription("WikiData ID file").isRequired().withLongOpt("wikidata-id").create("i"));
    commandLineWithLogger.addOption(OptionBuilder.withArgName("file").hasArg()
            .withDescription("Airpedia Person file").isRequired().withLongOpt("airpedia").create("a"));
    commandLineWithLogger.addOption(OptionBuilder.withArgName("file").hasArg().withDescription("Output file")
            .isRequired().withLongOpt("output").create("o"));
    CommandLine commandLine = null;/*from   w ww  .  j  a  va 2 s.c  om*/
    try {
        commandLine = commandLineWithLogger.getCommandLine(args);
        PropertyConfigurator.configure(commandLineWithLogger.getLoggerProps());
    } catch (Exception e) {
        System.exit(1);
    }

    String wikiIDFileName = commandLine.getOptionValue("wikidata-id");
    String airpediaFileName = commandLine.getOptionValue("airpedia");
    String outputFileName = commandLine.getOptionValue("output");

    HashMap<Integer, String> wikiIDs = new HashMap<>();
    HashSet<Integer> airpediaClasses = new HashSet<>();

    List<String> strings;

    logger.info("Loading file " + wikiIDFileName);
    strings = Files.readLines(new File(wikiIDFileName), Charsets.UTF_8);
    for (String line : strings) {
        line = line.trim();
        if (line.length() == 0) {
            continue;
        }
        if (line.startsWith("#")) {
            continue;
        }

        String[] parts = line.split("\t");
        if (parts.length < 2) {
            continue;
        }

        int id;
        try {
            id = Integer.parseInt(parts[0]);
        } catch (Exception e) {
            continue;
        }
        wikiIDs.put(id, parts[1]);
    }

    logger.info("Loading file " + airpediaFileName);
    strings = Files.readLines(new File(airpediaFileName), Charsets.UTF_8);
    for (String line : strings) {
        line = line.trim();
        if (line.length() == 0) {
            continue;
        }
        if (line.startsWith("#")) {
            continue;
        }

        String[] parts = line.split("\t");
        if (parts.length < 2) {
            continue;
        }

        int id;
        try {
            id = Integer.parseInt(parts[0]);
        } catch (Exception e) {
            continue;
        }
        airpediaClasses.add(id);
    }

    logger.info("Saving information");
    BufferedWriter writer = new BufferedWriter(new FileWriter(outputFileName));
    for (int i : wikiIDs.keySet()) {
        if (!airpediaClasses.contains(i)) {
            continue;
        }

        writer.append(wikiIDs.get(i)).append("\n");
    }
    writer.close();
}

---

From source file:edu.cmu.lti.oaqa.knn4qa.apps.CollectionDiffer.java

public static void main(String[] args) {
    Options options = new Options();

    options.addOption("i1", null, true, "Input file 1");
    options.addOption("i2", null, true, "Input file 2");
    options.addOption("o", null, true, "Output file");

    CommandLineParser parser = new org.apache.commons.cli.GnuParser();

    try {//from  ww w  .  j  ava 2  s.c o m
        CommandLine cmd = parser.parse(options, args);

        InputStream input1 = null, input2 = null;

        if (cmd.hasOption("i1")) {
            input1 = CompressUtils.createInputStream(cmd.getOptionValue("i1"));
        } else {
            Usage("Specify 'Input file 1'");
        }
        if (cmd.hasOption("i2")) {
            input2 = CompressUtils.createInputStream(cmd.getOptionValue("i2"));
        } else {
            Usage("Specify 'Input file 2'");
        }

        HashSet<String> hSubj = new HashSet<String>();

        BufferedWriter out = null;

        if (cmd.hasOption("o")) {
            String outFile = cmd.getOptionValue("o");

            out = new BufferedWriter(new OutputStreamWriter(CompressUtils.createOutputStream(outFile)));
        } else {
            Usage("Specify 'Output file'");
        }

        XmlIterator inpIter2 = new XmlIterator(input2, YahooAnswersReader.DOCUMENT_TAG);

        int docNum = 1;
        for (String oneRec = inpIter2.readNext(); !oneRec.isEmpty(); oneRec = inpIter2.readNext(), ++docNum) {
            if (docNum % 10000 == 0) {
                System.out.println(String.format(
                        "Loaded and memorized questions for %d documents from the second input file", docNum));
            }
            ParsedQuestion q = YahooAnswersParser.parse(oneRec, false);
            hSubj.add(q.mQuestion);
        }

        XmlIterator inpIter1 = new XmlIterator(input1, YahooAnswersReader.DOCUMENT_TAG);

        System.out.println("=============================================");
        System.out.println("Memoization is done... now let's diff!!!");
        System.out.println("=============================================");

        docNum = 1;
        int skipOverlapQty = 0, skipErrorQty = 0;
        for (String oneRec = inpIter1.readNext(); !oneRec.isEmpty(); ++docNum, oneRec = inpIter1.readNext()) {
            if (docNum % 10000 == 0) {
                System.out.println(String.format("Processed %d documents from the first input file", docNum));
            }

            oneRec = oneRec.trim() + System.getProperty("line.separator");

            ParsedQuestion q = null;
            try {
                q = YahooAnswersParser.parse(oneRec, false);
            } catch (Exception e) {
                // If <bestanswer>...</bestanswer> is missing we may end up here...
                // This is a bit funny, because this element is supposed to be mandatory,
                // but it's not.
                System.err.println("Skipping due to parsing error, exception: " + e);
                skipErrorQty++;
                continue;
            }
            if (hSubj.contains(q.mQuestion.trim())) {
                //System.out.println(String.format("Skipping uri='%s', question='%s'", q.mQuestUri, q.mQuestion));
                skipOverlapQty++;
                continue;
            }

            out.write(oneRec);
        }
        System.out.println(
                String.format("Processed %d documents, skipped because of overlap/errors %d/%d documents",
                        docNum - 1, skipOverlapQty, skipErrorQty));
        out.close();
    } catch (ParseException e) {
        Usage("Cannot parse arguments");
    } catch (Exception e) {
        e.printStackTrace();
        System.err.println("Terminating due to an exception: " + e);
        System.exit(1);
    }
}

---

From source file:Main.java

public static <T> boolean isSubset(Collection<T> subset, Collection<T> superset) {
    if ((superset == null) || (superset.size() == 0)) {
        return ((subset == null) || (subset.size() == 0));
    }/*from   ww w . j a  va 2  s.  c om*/

    HashSet<T> hash = new HashSet<T>(superset);
    for (T t : subset) {
        if (!hash.contains(t)) {
            return false;
        }
    }
    return true;
}

---

From source file:Main.java

private static boolean isValidTagException(HashSet<?> tagExceptions, String buffer) {
    String tagName = getTagName(buffer);
    if (tagExceptions.contains(tagName)) {
        return true;
    }//  ww w . ja  v  a  2 s  .  c o m
    return false;
}

---

From source file:Main.java

public static <T> List<T> updateList(List<T> toBeUpdated, HashSet<T> updates) {
    HashSet<T> toBeUpdatedHashSet = new HashSet<T>(toBeUpdated);
    for (T id : updates) {
        if (toBeUpdatedHashSet.contains(id)) {
            toBeUpdatedHashSet.remove(id);
        } else {//from  w  w  w . j a  v a  2 s. c  om
            toBeUpdatedHashSet.add(id);
        }
    }

    return new ArrayList<T>(toBeUpdatedHashSet);
}

---

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