Example usage for java.util List size

Introduction

In this page you can find the example usage for java.util List size.

Prototype

int size();

Source Link

Document

Returns the number of elements in this list.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    List list1 = new ArrayList();
    List list2 = new ArrayList();

    list1.addAll(list2);//  w  w  w  . ja  v  a2s. co  m

    list1.removeAll(list2);

    list1.retainAll(list2);

    list1.clear();

    int newSize = 2;
    list1.subList(newSize, list1.size()).clear();
}

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From source file:com.aerospike.examples.BatchUpdateTTL.java

public static void main(String[] args) throws AerospikeException {
    try {/* w w  w .  j  a  va  2  s . com*/
        Options options = new Options();
        options.addOption("h", "host", true, "Server hostname (default: 127.0.0.1)");
        options.addOption("p", "port", true, "Server port (default: 3000)");
        options.addOption("n", "namespace", true, "Namespace (default: test)");
        options.addOption("s", "set", true, "Set (default: demo)");
        options.addOption("u", "usage", false, "Print usage.");

        CommandLineParser parser = new PosixParser();
        CommandLine cl = parser.parse(options, args, false);

        String host = cl.getOptionValue("h", "127.0.0.1");
        String portString = cl.getOptionValue("p", "3000");
        int port = Integer.parseInt(portString);
        String namespace = cl.getOptionValue("n", "test");
        String set = cl.getOptionValue("s", "demo");
        log.debug("Host: " + host);
        log.debug("Port: " + port);
        log.debug("Namespace: " + namespace);
        log.debug("Set: " + set);

        @SuppressWarnings("unchecked")
        List<String> cmds = cl.getArgList();
        if (cmds.size() == 0 && cl.hasOption("u")) {
            logUsage(options);
            return;
        }

        BatchUpdateTTL as = new BatchUpdateTTL(host, port, namespace, set);

        as.work();

    } catch (Exception e) {
        log.error("Critical error", e);
    }
}

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From source file:br.eb.ime.labprog3.tam.GeradorGrafoDijkstra.java

public static void main(String args[]) {
    String fileNameTrechos = "rotas.xml";
    String fileNameAeroportos = "aeroportos.xml";

    File aeroportos = new File(fileNameAeroportos);
    File trechos = new File(fileNameTrechos);

    Resource resource = null;/*www. j  a  v  a2 s . c  om*/
    TrechoDAO daoTrecho = null;
    AeroportoDAO daoAeroporto = null;

    daoTrecho = new TrechoDAO(trechos);

    daoAeroporto = new AeroportoDAO(aeroportos);

    int indexOrigem = 4;
    int indexDestino = 23;

    List<Aeroporto> listaDeAeroportos = daoAeroporto.listarAeroportos();
    List<Trecho> listarTrechos = daoTrecho.listarTrechos();
    GeradorGrafoDijkstra geradorDeGrafo = new GeradorGrafoDijkstra(daoAeroporto.listarAeroportos(),
            daoTrecho.listarTrechos());
    List<Aeroporto> listaDeAeroportosDestino = geradorDeGrafo.geraMenorCaminho(indexOrigem, indexDestino);
    System.out.println(listaDeAeroportosDestino.size());
    System.out.println("Origem: " + listaDeAeroportos.get(indexOrigem - 1).getId() + " : "
            + listaDeAeroportos.get(indexOrigem - 1).getNome());
    System.out.println("Destino: " + listaDeAeroportos.get(indexDestino - 1).getId() + " : "
            + listaDeAeroportos.get(indexDestino - 1).getNome());
    for (Aeroporto aeroporto : listaDeAeroportosDestino) {
        System.out.println(aeroporto.getId() + " : " + aeroporto.getNome());
    }

}

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From source file:Main.java

public static void main(String[] args) {
    Person p = new Person("A");
    Animal a = new Animal("B");
    Thing t = new Thing("C");
    String text = "hello";
    Integer number = 1000;// ww  w.j  av a2 s  .c o  m

    List<Object> list = new ArrayList<Object>();
    list.add(p);
    list.add(a);
    list.add(t);
    list.add(text);
    list.add(number);

    for (int i = 0; i < list.size(); i++) {
        Object o = list.get(i);
        if (o instanceof Person) {
            System.out.println("My name is " + ((Person) o).getName());
        } else if (o instanceof Animal) {
            System.out.println("I live in " + ((Animal) o).getHabitat());
        } else if (o instanceof Thing) {
            System.out.println("My color is " + ((Thing) o).getColor());
        } else if (o instanceof String) {
            System.out.println("My text is " + o.toString());
        } else if (o instanceof Integer) {
            System.out.println("My value is " + ((Integer) o));
        }
    }
}

---

From source file:com.impetus.kvapps.runner.AppRunner.java

/**
 * main runner method//from  w  w  w . ja  va2  s.  c o  m
 * @param args takes excel data file as input argument args[0].
 */
public static void main(String[] args) {

    // Override CQL version while instantiating entity manager factory.

    EntityManagerFactory emf = Persistence.createEntityManagerFactory("twissandra,twingo,twirdbms");
    EntityManager em = emf.createEntityManager();

    try {

        //populate user set from excel sheet.
        Set<User> users = UserBroker.brokeUserList(args[0]);

        for (Iterator<User> iterator = users.iterator(); iterator.hasNext();) {
            User user = (User) iterator.next();

            // on Persist
            ExecutorService.onPersist(em, user);

            // on find by id.
            ExecutorService.findByKey(em, "BigDataUser");

            List<User> fetchedUsers = ExecutorService.onQueryByEmail(em, user);

            if (fetchedUsers != null && fetchedUsers.size() > 0) {
                logger.info(user.toString());
            }

            logger.info("");
            System.out.println("#######################Querying##########################################");
            logger.info("");
            logger.info("");

        }

        // Execute wild search query.
        String query = "Select u from User u";
        logger.info(query);
        ExecutorService.findByQuery(em, query);

        // // Execute native CQL. Fetch tweets for given user.
        logger.info("");
        System.out.println("#######################Querying##########################################");
        logger.info("");
        logger.info("");

        query = "Select * from tweets where user_id='RDBMSUser'";
        logger.info(query);
        ExecutorService.findByNativeQuery(em, query);
    } finally {
        onDestroyDBResources(emf, em);
    }
}

---

From source file:com.stratio.decision.executables.DataFlowFromCsvMain.java

public static void main(String[] args) throws IOException, NumberFormatException, InterruptedException {
    if (args.length < 4) {
        log.info(//from   ww  w.  j av  a  2s . c om
                "Usage: \n param 1 - path to file \n param 2 - stream name to send the data \n param 3 - time in ms to wait to send each data \n param 4 - broker list");
    } else {
        Producer<String, String> producer = new Producer<String, String>(createProducerConfig(args[3]));
        Gson gson = new Gson();

        Reader in = new FileReader(args[0]);
        CSVParser parser = CSVFormat.DEFAULT.parse(in);

        List<String> columnNames = new ArrayList<>();
        for (CSVRecord csvRecord : parser.getRecords()) {

            if (columnNames.size() == 0) {
                Iterator<String> iterator = csvRecord.iterator();
                while (iterator.hasNext()) {
                    columnNames.add(iterator.next());
                }
            } else {
                StratioStreamingMessage message = new StratioStreamingMessage();

                message.setOperation(STREAM_OPERATIONS.MANIPULATION.INSERT.toLowerCase());
                message.setStreamName(args[1]);
                message.setTimestamp(System.currentTimeMillis());
                message.setSession_id(String.valueOf(System.currentTimeMillis()));
                message.setRequest_id(String.valueOf(System.currentTimeMillis()));
                message.setRequest("dummy request");

                List<ColumnNameTypeValue> sensorData = new ArrayList<>();
                for (int i = 0; i < columnNames.size(); i++) {

                    // Workaround
                    Object value = null;
                    try {
                        value = Double.valueOf(csvRecord.get(i));
                    } catch (NumberFormatException e) {
                        value = csvRecord.get(i);
                    }
                    sensorData.add(new ColumnNameTypeValue(columnNames.get(i), null, value));
                }

                message.setColumns(sensorData);

                String json = gson.toJson(message);
                log.info("Sending data: {}", json);
                producer.send(new KeyedMessage<String, String>(InternalTopic.TOPIC_DATA.getTopicName(),
                        STREAM_OPERATIONS.MANIPULATION.INSERT, json));

                log.info("Sleeping {} ms...", args[2]);
                Thread.sleep(Long.valueOf(args[2]));
            }
        }
        log.info("Program completed.");
    }
}

---

From source file:com.mmone.gpdati.allotment.record.AllotmentRecordsListBuilder.java

public static void main(String[] args) {

    AllotmentLineProvvider afr = new AllotmentFileReader(
            "D:/tmp_desktop/scrigno-gpdati/FILE_DISPO__20160802.txt");
    AllotmentRecordsListBuilder arlb = new AllotmentRecordsListBuilder(afr);

    try {/*from   w w  w.  j a va  2  s .  co  m*/
        List<AllotmentRecord> records = arlb.getGroupedRecords();
        System.out.println("Records in list " + records.size());

        if (true)
            for (AllotmentRecord record : records) {
                System.out.println("---- " + record.getCompleteKey());
            }

        //MapUtils.debugPrint(System.out , "MAP", arlb.getMappedRecords());
        //MapUtils.debugPrint(System.out , "MAP", reg);
    } catch (Exception ex) {
        SoapUI.log.info(ex.getMessage());
        Logger.getLogger(AllotmentRecordsListBuilder.class.getName()).log(Level.SEVERE, null, ex);
    }
}

---

From source file:EmpComparator.java

public static void main(String args[]) {
    String names[] = { "Bart", "Hugo", "Lisa", "Marge", "Homer", "Maggie", "Roy" };

    // Convert to list
    List list = new ArrayList(Arrays.asList(names));

    // Ensure list sorted
    Collections.sort(list);/*w  ww  . j  a va2  s .c o m*/
    System.out.println("Sorted list: [length: " + list.size() + "]");
    System.out.println(list);

    // Search for element in list
    int index = Collections.binarySearch(list, "Maggie");
    System.out.println("Found Maggie @ " + index);

    // Search for element not in list
    index = Collections.binarySearch(list, "Jimbo Jones");
    System.out.println("Didn't find Jimbo Jones @ " + index);

    // Insert
    int newIndex = -index - 1;
    list.add(newIndex, "Jimbo Jones");
    System.out.println("With Jimbo Jones added: [length: " + list.size() + "]");
    System.out.println(list);

    // Min should be Bart
    System.out.println(Collections.min(list));
    // Max should be Roy
    System.out.println(Collections.max(list));

    Comparator comp = Collections.reverseOrder();

    // Reversed Min should be Roy
    System.out.println(Collections.min(list, comp));
    // Reversed Max should be Bart
    System.out.println(Collections.max(list, comp));
}

---

From source file:MainClass.java

public static void main(String[] a) {
    List list = Arrays.asList(new String[] { "A", "B", "C", "D" });

    Object[] objArray = list.toArray();

    for (Object obj : objArray) {
        System.out.println(obj);//  ww w  .j  a  va 2 s.  c  o  m
    }

    String[] strArray = (String[]) list.toArray(new String[list.size()]);

    for (String string : strArray) {
        System.out.println(string);
    }
}

---

From source file:com.linkedin.pinot.perf.MultiValueReaderWriterBenchmark.java

public static void main(String[] args) throws Exception {
    List<String> lines = IOUtils.readLines(new FileReader(new File(args[0])));
    int totalDocs = lines.size();
    int max = Integer.MIN_VALUE;
    int maxNumberOfMultiValues = Integer.MIN_VALUE;
    int totalNumValues = 0;
    int data[][] = new int[totalDocs][];
    for (int i = 0; i < lines.size(); i++) {
        String line = lines.get(i);
        String[] split = line.split(",");
        totalNumValues = totalNumValues + split.length;
        if (split.length > maxNumberOfMultiValues) {
            maxNumberOfMultiValues = split.length;
        }//  w w  w.  jav  a  2  s.c om
        data[i] = new int[split.length];
        for (int j = 0; j < split.length; j++) {
            String token = split[j];
            int val = Integer.parseInt(token);
            data[i][j] = val;
            if (val > max) {
                max = val;
            }
        }
    }
    int maxBitsNeeded = (int) Math.ceil(Math.log(max) / Math.log(2));
    int size = 2048;
    int[] offsets = new int[size];
    int bitMapSize = 0;
    File outputFile = new File("output.mv.fwd");

    FixedBitSkipListSCMVWriter fixedBitSkipListSCMVWriter = new FixedBitSkipListSCMVWriter(outputFile,
            totalDocs, totalNumValues, maxBitsNeeded);

    for (int i = 0; i < totalDocs; i++) {
        fixedBitSkipListSCMVWriter.setIntArray(i, data[i]);
        if (i % size == size - 1) {
            MutableRoaringBitmap rr1 = MutableRoaringBitmap.bitmapOf(offsets);
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            DataOutputStream dos = new DataOutputStream(bos);
            rr1.serialize(dos);
            dos.close();
            //System.out.println("Chunk " + i / size + " bitmap size:" + bos.size());
            bitMapSize += bos.size();
        } else if (i == totalDocs - 1) {
            MutableRoaringBitmap rr1 = MutableRoaringBitmap.bitmapOf(Arrays.copyOf(offsets, i % size));
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            DataOutputStream dos = new DataOutputStream(bos);
            rr1.serialize(dos);
            dos.close();
            //System.out.println("Chunk " + i / size + " bitmap size:" + bos.size());
            bitMapSize += bos.size();
        }
    }
    fixedBitSkipListSCMVWriter.close();
    System.out.println("Output file size:" + outputFile.length());
    System.out.println("totalNumberOfDoc\t\t\t:" + totalDocs);
    System.out.println("totalNumberOfValues\t\t\t:" + totalNumValues);
    System.out.println("chunk size\t\t\t\t:" + size);
    System.out.println("Num chunks\t\t\t\t:" + totalDocs / size);
    int numChunks = totalDocs / size + 1;
    int totalBits = (totalNumValues * maxBitsNeeded);
    int dataSizeinBytes = (totalBits + 7) / 8;

    System.out.println("Raw data size with fixed bit encoding\t:" + dataSizeinBytes);
    System.out.println("\nPer encoding size");
    System.out.println();
    System.out.println("size (offset + length)\t\t\t:" + ((totalDocs * (4 + 4)) + dataSizeinBytes));
    System.out.println();
    System.out.println("size (offset only)\t\t\t:" + ((totalDocs * (4)) + dataSizeinBytes));
    System.out.println();
    System.out.println("bitMapSize\t\t\t\t:" + bitMapSize);
    System.out.println("size (with bitmap)\t\t\t:" + (bitMapSize + (numChunks * 4) + dataSizeinBytes));

    System.out.println();
    System.out.println("Custom Bitset\t\t\t\t:" + (totalNumValues + 7) / 8);
    System.out.println("size (with custom bitset)\t\t\t:"
            + (((totalNumValues + 7) / 8) + (numChunks * 4) + dataSizeinBytes));

}

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