Example usage for java.util Collections nCopies

Introduction

In this page you can find the example usage for java.util Collections nCopies.

Prototype

public static <T> List<T> nCopies(int n, T o)

Source Link

Document

Returns an immutable list consisting of n copies of the specified object.

Usage

From source file:Main.java

public static void main(String[] args) {
    List list = Collections.nCopies(5, "A");
    Iterator itr = list.iterator();
    while (itr.hasNext())
        System.out.println(itr.next());
}

From source file:MainClass.java

public static void main(String[] a) {
    List list = new LinkedList(Collections.nCopies(10, null));
    System.out.println(list);
}

From source file:Main.java

public static void main(String[] args) {
    // create a list with n copies 
    List<String> list = Collections.nCopies(5, "java2s.com");

    System.out.println(list);/*from w w w .j  a  v  a 2 s.  c  o m*/
}

From source file:Utilities.java

public static void main(String[] args) {
    List list = Arrays.asList("one Two three Four five six one".split(" "));
    System.out.println(list);//from w  w w  .  ja  va2 s.c o  m
    System.out.println("max: " + Collections.max(list));
    System.out.println("min: " + Collections.min(list));
    AlphabeticComparator comp = new AlphabeticComparator();
    System.out.println("max w/ comparator: " + Collections.max(list, comp));
    System.out.println("min w/ comparator: " + Collections.min(list, comp));
    List sublist = Arrays.asList("Four five six".split(" "));
    System.out.println("indexOfSubList: " + Collections.indexOfSubList(list, sublist));
    System.out.println("lastIndexOfSubList: " + Collections.lastIndexOfSubList(list, sublist));
    Collections.replaceAll(list, "one", "Yo");
    System.out.println("replaceAll: " + list);
    Collections.reverse(list);
    System.out.println("reverse: " + list);
    Collections.rotate(list, 3);
    System.out.println("rotate: " + list);
    List source = Arrays.asList("in the matrix".split(" "));
    Collections.copy(list, source);
    System.out.println("copy: " + list);
    Collections.swap(list, 0, list.size() - 1);
    System.out.println("swap: " + list);
    Collections.fill(list, "pop");
    System.out.println("fill: " + list);
    List dups = Collections.nCopies(3, "snap");
    System.out.println("dups: " + dups);
    // Getting an old-style Enumeration:
    Enumeration e = Collections.enumeration(dups);
    Vector v = new Vector();
    while (e.hasMoreElements())
        v.addElement(e.nextElement());
    // Converting an old-style Vector
    // to a List via an Enumeration:
    ArrayList arrayList = Collections.list(v.elements());
    System.out.println("arrayList: " + arrayList);

}

From source file:org.languagetool.dev.RuleDetails.java

public static void main(String[] args) throws ParseException, IOException {
    Options options = new Options();
    options.addRequiredOption("l", "language", true, "Language for rules");
    options.addRequiredOption("f", "file", true, "Input file");
    options.addRequiredOption("o", "output", true, "Output file");
    options.addRequiredOption("c", "column", true, "Column in input file");
    options.addOption("n", "ngramPath", true, "Ngram path to activate ngram rules");

    CommandLine cmd = new DefaultParser().parse(options, args);

    String langCode = cmd.getOptionValue('l');
    String inputFile = cmd.getOptionValue('f');
    String outputFile = cmd.getOptionValue('o');
    String column = cmd.getOptionValue('c');
    String ngramPath = cmd.hasOption('n') ? cmd.getOptionValue('n') : null;

    RuleDetails details = new RuleDetails(Languages.getLanguageForShortCode(langCode), ngramPath);

    CSVFormat format = CSVFormat.RFC4180.withFirstRecordAsHeader();

    try (CSVParser parser = CSVParser.parse(new File(inputFile), Charset.defaultCharset(), format)) {
        try (CSVPrinter printer = new CSVPrinter(new BufferedWriter(new FileWriter(outputFile)), format)) {
            Map<String, Integer> oldHeader = parser.getHeaderMap();
            List<String> newHeader = new ArrayList<>(Collections.nCopies(oldHeader.size(), null));

            for (Map.Entry<String, Integer> entry : oldHeader.entrySet()) {
                newHeader.set(entry.getValue(), entry.getKey());
            }//from ww w  . j a v a2s  .co  m
            newHeader.add("description");
            newHeader.add("category");
            printer.printRecord(newHeader);

            if (!oldHeader.containsKey(column)) {
                throw new RuntimeException("Input file does not contain specified column " + column);
            }

            List<CSVRecord> records = parser.getRecords();

            records.stream().sequential().map(record -> {
                String ruleId = record.get(column);
                Rule rule = details.getRuleById(ruleId);
                List<String> transformedValues = new ArrayList<>();
                record.iterator().forEachRemaining(transformedValues::add);
                if (rule == null) {
                    transformedValues.add("");
                    transformedValues.add("");
                } else {
                    transformedValues.add(rule.getDescription());
                    transformedValues.add(rule.getCategory().getId().toString());
                }
                return transformedValues;
            }).forEachOrdered(values -> {
                try {
                    printer.printRecord(values);
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            });
        }
    }

}

From source file:Main.java

public static void resize(List list, int newSize) {
    if (newSize < list.size()) {
        list.subList(newSize, list.size()).clear();
    } else {//from w  w w.  j a  va 2  s  .c om
        list.addAll(Collections.nCopies(newSize - list.size(), null));
    }
}

From source file:Main.java

public static <T> List<T> nCopies(final int n, final T value) {
    return new ArrayList<T>(Collections.nCopies(n, value));
}

From source file:com.github.rinde.rinsim.scenario.ScenarioTestUtil.java

public static Scenario create(long seed) {
    final int endTime = 3 * 60 * 60 * 1000;
    Scenario.Builder b = Scenario.builder()
            .addModel(PlaneRoadModel.supplier(new Point(0, 0), new Point(10, 10), SI.KILOMETER,
                    Measure.valueOf(50d, NonSI.KILOMETERS_PER_HOUR)))
            .addModel(DefaultPDPModel.supplier(TimeWindowPolicies.LIBERAL)).addEvents(Collections.nCopies(10,
                    new AddVehicleEvent(-1, VehicleDTO.builder().startPosition(new Point(5, 5)).build())));

    RandomGenerator rng = new MersenneTwister(seed);
    for (int i = 0; i < 20; i++) {
        long announceTime = rng.nextInt(DoubleMath.roundToInt(endTime * .8, RoundingMode.FLOOR));
        b.addEvent(new AddParcelEvent(ParcelDTO
                .builder(new Point(rng.nextDouble() * 10, rng.nextDouble() * 10),
                        new Point(rng.nextDouble() * 10, rng.nextDouble() * 10))
                .orderAnnounceTime(announceTime).pickupTimeWindow(new TimeWindow(announceTime, endTime))
                .deliveryTimeWindow(new TimeWindow(announceTime, endTime)).neededCapacity(0).build()));
    }//w  w w  .j  a  va 2s.  c  om

    b.addEvent(new TimedEvent(PDPScenarioEvent.TIME_OUT, endTime)).scenarioLength(endTime)
            .stopCondition(new EndTimeStopCondition(endTime));

    b.addEventType(PDPScenarioEvent.ADD_DEPOT);

    return b.build();
}

From source file:org.apache.reef.io.network.util.Utils.java

public static List<Integer> createUniformCounts(final int elemSize, final int childSize) {
    final int remainder = elemSize % childSize;
    final int quotient = elemSize / childSize;
    final ArrayList<Integer> result = new ArrayList<>(childSize);
    result.addAll(Collections.nCopies(remainder, quotient + 1));
    result.addAll(Collections.nCopies(childSize - remainder, quotient));
    return Collections.unmodifiableList(result);
}

From source file:com.github.rinde.rinsim.pdptw.common.ScenarioTestUtil.java

/**
 * Creates a random scenario./* w  w w.j  av a  2  s.  c  o  m*/
 * @param seed The seed to use.
 * @param models Additional models (optional).
 * @return A new random scenario.
 */
public static Scenario createRandomScenario(long seed, ModelBuilder<?, ?>... models) {
    final int endTime = 3 * 60 * 60 * 1000;
    final Scenario.Builder b = Scenario.builder().addModel(RoadModelBuilders.plane())
            .addModel(DefaultPDPModel.builder()).addModels(asList(models)).addEvents(Collections.nCopies(10,
                    AddVehicleEvent.create(-1, VehicleDTO.builder().startPosition(new Point(5, 5)).build())));

    final RandomGenerator rng = new MersenneTwister(seed);
    for (int i = 0; i < 20; i++) {
        final long announceTime = rng.nextInt(DoubleMath.roundToInt(endTime * .8, RoundingMode.FLOOR));
        b.addEvent(AddParcelEvent.create(Parcel
                .builder(new Point(rng.nextDouble() * 10, rng.nextDouble() * 10),
                        new Point(rng.nextDouble() * 10, rng.nextDouble() * 10))
                .orderAnnounceTime(announceTime).pickupTimeWindow(TimeWindow.create(announceTime, endTime))
                .deliveryTimeWindow(TimeWindow.create(announceTime, endTime)).neededCapacity(0).buildDTO()));
    }

    b.addEvent(TimeOutEvent.create(endTime)).scenarioLength(endTime)
            .setStopCondition(StopConditions.limitedTime(endTime));

    return b.build();
}