Example usage for java.util Collections reverse

List of usage examples for java.util Collections reverse

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Introduction

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

Prototype

@SuppressWarnings({ "rawtypes", "unchecked" })
public static void reverse(List<?> list)

Source Link

Document

Reverses the order of the elements in the specified list.

This method runs in linear time.

Usage

From source file:Main.java

public static void main(String[] args) {
    try {//from   ww w  . j  av  a 2  s.  co  m
        BufferedReader input = new BufferedReader(new FileReader(args[0]));
        ArrayList list = new ArrayList();
        String line;
        while ((line = input.readLine()) != null) {
            list.add(line);
        }
        input.close();

        Collections.reverse(list);

        PrintWriter output = new PrintWriter(new BufferedWriter(new FileWriter(args[1])));
        for (Iterator i = list.iterator(); i.hasNext();) {
            output.println((String) i.next());
        }
        output.close();
    } catch (IOException e) {
        System.err.println(e);
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {

    int[] intArray = new int[] { 4, 1, 3, -23 };
    Arrays.sort(intArray);//  w w w  .  ja  v  a2s.c  o m
    // [-23, 1, 3, 4]

    String[] strArray = new String[] { "z", "a", "C" };
    Arrays.sort(strArray);
    // [C, a, z]

    // Case-insensitive sort
    Arrays.sort(strArray, String.CASE_INSENSITIVE_ORDER);
    // [a, C, z]

    // Reverse-order sort
    Arrays.sort(strArray, Collections.reverseOrder());
    // [z, a, C]

    // Case-insensitive reverse-order sort
    Arrays.sort(strArray, String.CASE_INSENSITIVE_ORDER);
    Collections.reverse(Arrays.asList(strArray));
    // [z, C, a]
}

From source file:in.sc.main.ABC.java

public static void main(String[] args) {
    List list = new ArrayList();
    list.add("1");
    list.add("2");
    list.add("3");
    Collections.reverse(list);
    list.iterator();/*from ww  w  .  j  av a2s  .  c om*/
    for (Object obj : reverse(list)) {
        System.out.print(obj + ", ");
    }

    D x = (D) new D();
    if (x instanceof I) {
        System.out.println("I");
    }
    if (x instanceof J) {
        System.out.println("J");
    }
    if (x instanceof C) {
        System.out.println("C");
    }
    if (x instanceof D) {
        System.out.println("D");
    }
    xyz x1 = new xyz("Test");
    int x2 = 111;

    Rank abc = Rank.FIRST;
    System.out.println("" + abc.SECOND);
    final int j = 2;
    switch (x2) {
    case 1:
        System.out.println("1");
        break;
    case 10:
        System.out.println("10");
        break;
    case j:
        System.out.println("2");
        break;
    case 5:
        System.out.println("5");
        break;
    default:
        System.out.println("Default");
        break;
    }
    String str1 = "lower", str2 = "LOWER", str3 = "UPPER";
    str1.toUpperCase();
    str1.replace("LOWER", "UPPER");
    System.out
            .println((str1.equals(str2)) + " " + (str1.equals(str3)) + "  " + str1 + "  " + str2 + "  " + str3);
    for (int i = 0; i < 3; i++) {
        System.out.println("" + i);
        switch (i) {
        case 0:
            break;
        case 1:
            System.out.println("one");
        case 2:
            System.out.println("two");
        case 3:
            System.out.println("three");
        }
    }
    System.out.println("done");
    ABC a = new ABC("a", "b");
    ABC b = new ABC(a);
}

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);//www  .jav a 2  s  . co 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:com.discursive.jccook.xml.bardsearch.TermFreq.java

public static void main(String[] pArgs) throws Exception {
    logger.info("Threshold is 200");
    Integer threshold = new Integer(200);

    IndexReader reader = IndexReader.open("index");
    TermEnum enumVar = reader.terms();/*w  w  w .java  2s  .  co m*/
    List termList = new ArrayList();
    while (enumVar.next()) {
        if (enumVar.docFreq() >= threshold.intValue() && enumVar.term().field().equals("speech")) {
            Freq freq = new Freq(enumVar.term().text(), enumVar.docFreq());
            termList.add(freq);
        }
    }
    Collections.sort(termList);
    Collections.reverse(termList);

    System.out.println("Frequency | Term");
    Iterator iterator = termList.iterator();
    while (iterator.hasNext()) {
        Freq freq = (Freq) iterator.next();
        System.out.print(freq.frequency);
        System.out.println(" | " + freq.term);
    }
}

From source file:org.berlin.crawl.util.ListSeedsMain.java

public static void main(final String[] args) {
    logger.info("Running");
    final ApplicationContext ctx = new ClassPathXmlApplicationContext(
            "/org/berlin/batch/batch-databot-context.xml");
    final BotCrawlerDAO dao = new BotCrawlerDAO();
    final SessionFactory sf = (SessionFactory) ctx.getBean("sessionFactory");
    Session session = sf.openSession();// ww  w  .  ja  va 2  s  .c  om

    final StringBuffer buf = new StringBuffer();
    final List<String> seeds = dao.findHosts(session);
    final String nl = System.getProperty("line.separator");
    buf.append(nl);
    for (final String seed : seeds) {
        buf.append(PREFIX);
        buf.append(seed);
        buf.append(POST1);
        buf.append("/");
        buf.append(POST2);
        buf.append(nl);
    } // End of the for //
    logger.info(buf.toString());

    // Now print the number of links //
    final List<Long> ii = dao.countLinks(session);
    logger.warn("Count of Links : " + ii);

    // Also print top hosts //
    final List<Object[]> hosts = dao.findTopHosts(session);
    Collections.reverse(hosts);
    for (final Object[] oo : hosts) {
        System.out.println(oo[0] + " // " + oo[1].getClass());
    }

    if (session != null) {
        // May not need to close the session
        session.close();
    } // End of the if //
    logger.info("Done");
}

From source file:com.acapulcoapp.alloggiatiweb.FileReader.java

public static void main(String[] args) throws UnknownHostException, IOException {
    // TODO code application logic here

    SpringApplication app = new SpringApplication(AcapulcoappApp.class);
    SimpleCommandLinePropertySource source = new SimpleCommandLinePropertySource(args);
    addDefaultProfile(app, source);/*from   w  ww . j a va2s . c o m*/

    ConfigurableApplicationContext context = app.run(args);

    initBeans(context);

    Map<LocalDate, List<List<String>>> map = new TreeMap<>();

    List<File> files = new ArrayList<>(FileUtils.listFiles(new File("/Users/chiccomask/Downloads/ALLOGGIATI"),
            new String[] { "txt" }, true));

    Collections.reverse(files);

    int count = 0;

    for (File file : files) {

        //            List<String> allLines = FileUtils.readLines(file, "windows-1252");
        List<String> allLines = FileUtils.readLines(file, "UTF-8");

        for (int i = 0; i < allLines.size();) {

            count++;

            List<String> record = new ArrayList<>();

            String line = allLines.get(i);
            String type = TIPO_ALLOGGIO.parse(line);

            switch (type) {
            case "16":
                record.add(line);
                i++;
                break;
            case "17": {
                record.add(line);
                boolean out = false;
                while (!out) {
                    i++;
                    if (i < allLines.size()) {
                        String subline = allLines.get(i);
                        String subtype = TIPO_ALLOGGIO.parse(subline);
                        if (!subtype.equals("19")) {
                            out = true;
                        } else {
                            record.add(subline);
                        }
                    } else {
                        out = true;
                    }
                }
                break;
            }
            case "18": {
                record.add(line);
                boolean out = false;
                while (!out) {
                    i++;
                    if (i < allLines.size()) {
                        String subline = allLines.get(i);
                        String subtype = TIPO_ALLOGGIO.parse(subline);
                        if (!subtype.equals("20")) {
                            out = true;
                        } else {
                            record.add(subline);
                        }
                    } else {
                        out = true;
                    }
                }
                break;
            }
            default:
                break;
            }

            LocalDate arrived = LocalDate.parse(DATA_ARRIVO.parse(line),
                    DateTimeFormatter.ofPattern(DATE_PATTERN));
            if (!map.containsKey(arrived)) {
                map.put(arrived, new ArrayList<>());
            }
            map.get(arrived).add(record);
        }
    }

    for (LocalDate date : map.keySet()) {

        System.out.println();
        System.out.println("process day " + date);

        for (List<String> record : map.get(date)) {

            System.out.println();
            System.out.println("process record ");
            for (String line : record) {
                System.out.println(line);
            }

            CheckinRecord checkinRecord = new CheckinRecord();

            //non lo setto per adesso
            String firstLine = record.get(0);

            String typeStr = TIPO_ALLOGGIO.parse(firstLine);
            CheckinType cht = checkinTypeRepository.find(typeStr);
            checkinRecord.setCheckinType(cht);

            int days = Integer.parseInt(PERMANENZA.parse(firstLine));
            checkinRecord.setDays(days);
            checkinRecord.setArrived(date);

            boolean isMain = true;

            List<Person> others = new ArrayList<>();

            for (String line : record) {
                Person p = extractPerson(line);

                if (p.getDistrictOfBirth() == null) {
                    System.out.println("district of birth not found " + p);
                }

                List<Person> duplicates = personRepository.findDuplicates(p.getSurname(), p.getName(),
                        p.getDateOfBirth());

                if (duplicates.isEmpty()) {
                    System.out.println("add new person " + p.getId() + " " + p);
                    personRepository.saveAndFlush(p);
                } else if (duplicates.size() == 1) {

                    Person found = duplicates.get(0);

                    if (p.getIdentityDocument() != null) {
                        //we sorted by date so we suppose 
                        //the file version is newer so we update the entity
                        p.setId(found.getId());
                        System.out.println("update person " + p.getId() + " " + p);
                        personRepository.saveAndFlush(p);

                    } else if (found.getIdentityDocument() != null) {
                        //on db there are more data so I use them.
                        p = found;
                        System.out.println("use already saved person " + p.getId() + " " + p);
                    } else {
                        p.setId(found.getId());
                        System.out.println("update person " + p.getId() + " " + p);
                        personRepository.saveAndFlush(p);
                    }

                } else {
                    throw new RuntimeException("More duplicated for " + p.getName());
                }

                if (isMain) {
                    checkinRecord.setMainPerson(p);
                    isMain = false;
                } else {
                    others.add(p);
                }
            }

            checkinRecord.setOtherPeople(new HashSet<>(others));

            if (checkinRecordRepository.alreadyExists(checkinRecord.getMainPerson(), date) != null) {
                System.out.println("already exists " + date + " p " + checkinRecord.getMainPerson());
            } else {
                System.out.println("save record ");
                checkinRecordRepository.saveAndFlush(checkinRecord);
            }
        }
    }

    //
    //            if (type.equals("16")) {
    //                List<String> record = new ArrayList<>();
    //                record.add(line);
    //                keepOpen = false;
    //            }
    //
    //            map.get(arrived).add(record);
    //        map.values().forEach((list) -> {
    //
    //            for (String line : list) {
    //
    //                Person p = null;
    //
    //                try {
    //
    //                    p = extractPerson(line);
    //
    //                    List<Person> duplicates = personRepository.findDuplicates(p.getSurname(), p.getName(), p.getDateOfBirth());
    //
    //                    if (duplicates.isEmpty()) {
    //                        personRepository.saveAndFlush(p);
    //
    //                    } else if (duplicates.size() > 1) {
    //                        System.out.println();
    //                        System.out.println("MULIPLE DUPLICATED");
    //
    //                        for (Person dd : duplicates) {
    //                            System.out.println(dd);
    //                        }
    //                        System.out.println("* " + p);
    //                        throw new RuntimeException();
    //                    } else {
    //
    ////                        if (!duplicates.get(0).getDistrictOfBirth().equals(p.getDistrictOfBirth())) {
    ////                        int index = 0;
    ////
    ////                        System.out.println();
    ////                        System.out.println("DUPLICATED");
    ////
    ////                        for (Person dd : duplicates) {
    ////                            System.out.println(dd);
    ////                            index++;
    ////                        }
    ////                        System.out.println("* " + p);
    ////                        System.out.println(file.getAbsolutePath() + " " + p);
    ////
    ////                        System.out.println();
    ////                        System.out.println();
    ////                        }
    ////                        duplicates.remove(0);
    ////                        personRepository.deleteInBatch(duplicates);
    ////                System.out.println();
    ////                System.out.println("Seleziona scelta");
    ////                Scanner s = new Scanner(System.in);
    ////                int selected;
    ////                try {
    ////                    selected = s.nextInt();
    ////                } catch (InputMismatchException e) {
    ////                    selected = 0;
    ////                }
    ////
    ////                if (duplicates.size() <= selected) {
    ////                    personRepository.deleteInBatch(duplicates);
    ////                    personRepository.saveAndFlush(p);
    ////                } else {
    ////                    duplicates.remove(selected);
    ////                    personRepository.deleteInBatch(duplicates);
    ////                }
    //                    }
    //
    //                } catch (Exception e) {
    //
    //                    System.out.println();
    ////                    System.out.println("ERROR READING lineCount=" + allLines.indexOf(line) + " line=" + line);
    ////                    System.out.println(file.getAbsolutePath());
    //                    System.out.println(p);
    //                    e.printStackTrace();
    //                    System.out.println();
    //                }
    //            }
    //        });
    context.registerShutdownHook();

    System.exit(0);
}

From source file:com.github.fhuss.kafka.streams.cep.demo.CEPStockKStreamsDemo.java

public static void main(String[] args) {

    Properties props = new Properties();
    props.put(StreamsConfig.APPLICATION_ID_CONFIG, "streams-cep");
    props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
    props.put(StreamsConfig.ZOOKEEPER_CONNECT_CONFIG, "localhost:2181");
    props.put(StreamsConfig.KEY_SERDE_CLASS_CONFIG, StockEventSerDe.class);
    props.put(StreamsConfig.VALUE_SERDE_CLASS_CONFIG, StockEventSerDe.class);

    // setting offset reset to earliest so that we can re-run the demo code with the same pre-loaded data
    props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");

    // build query
    final Pattern<Object, StockEvent> pattern = new QueryBuilder<Object, StockEvent>().select()
            .where((k, v, ts, store) -> v.volume > 1000).<Long>fold("avg", (k, v, curr) -> v.price).then()
            .select().zeroOrMore().skipTillNextMatch()
            .where((k, v, ts, state) -> v.price > (long) state.get("avg"))
            .<Long>fold("avg", (k, v, curr) -> (curr + v.price) / 2)
            .<Long>fold("volume", (k, v, curr) -> v.volume).then().select().skipTillNextMatch()
            .where((k, v, ts, state) -> v.volume < 0.8 * state.getOrElse("volume", 0L))
            .within(1, TimeUnit.HOURS).build();

    KStreamBuilder builder = new KStreamBuilder();

    CEPStream<Object, StockEvent> stream = new CEPStream<>(builder.stream("StockEvents"));

    KStream<Object, Sequence<Object, StockEvent>> stocks = stream.query("Stocks", pattern);

    stocks.mapValues(seq -> {/* w  w w  .  j a v  a 2s. c o  m*/
        JSONObject json = new JSONObject();
        seq.asMap().forEach((k, v) -> {
            JSONArray events = new JSONArray();
            json.put(k, events);
            List<String> collect = v.stream().map(e -> e.value.name).collect(Collectors.toList());
            Collections.reverse(collect);
            collect.forEach(e -> events.add(e));
        });
        return json.toJSONString();
    }).through(null, Serdes.String(), "Matches").print();

    //Use the topologyBuilder and streamingConfig to start the kafka streams process
    KafkaStreams streaming = new KafkaStreams(builder, props);
    //streaming.cleanUp();
    streaming.start();
}

From source file:Main.java

public static void reverse(List<?> list) {
    Collections.reverse(list);
}

From source file:Main.java

public static List reverse(List list) {
    Collections.reverse(list);

    return list;
}