Example usage for java.lang Math random

Introduction

In this page you can find the example usage for java.lang Math random.

Prototype

public static double random() 

Source Link

Document

Returns a double value with a positive sign, greater than or equal to 0.0 and less than 1.0 .

Usage

From source file:com.splout.db.examples.PageCountsDataGenerator.java

public void generate(File namesFile, int days, File outFolder) throws IOException {
    if (outFolder.exists()) {
        FileUtils.deleteDirectory(outFolder);
    }//from  w  w  w . jav a 2s  .  c o m
    outFolder.mkdirs();

    if (!namesFile.exists()) {
        throw new IllegalArgumentException("Provided names file doesn't exist (" + namesFile + ")");
    }

    List<String> names = Files.readLines(namesFile, Charset.forName("UTF-8"));

    DateTime today = new DateTime();
    DateTime someDaysBefore = today.minusDays(days);

    someDaysBefore = someDaysBefore.withMinuteOfHour(0);
    someDaysBefore = someDaysBefore.withSecondOfMinute(0);

    while (someDaysBefore.isBefore(today)) {
        for (int hour = 0; hour < 24; hour++) {

            someDaysBefore = someDaysBefore.withHourOfDay(hour);

            File currentFile = new File(outFolder, "pagecounts-" + format.print(someDaysBefore));
            BufferedWriter writer = new BufferedWriter(new FileWriter(currentFile));

            for (String name : names) {
                int pageviews = (int) (Math.random() * 10000) + 1;
                writer.write("en " + name + " " + pageviews + " 0" + "\n");
            }

            writer.close();
        }
        someDaysBefore = someDaysBefore.plusDays(1);
    }
}

---

From source file:it.infn.ct.futuregateway.apiserver.v1.TaskCollectionServiceIT.java

/**
 * Create applications and infrastructures to associate the
 * tasks with.// ww  w  .  java  2  s. co m
 */
@Before
public final void prepareApplication() {
    infras = new LinkedList<>();
    for (int i = 0; i < 1 + (int) TestData.MAX_ENTITIES_IN_LIST * Math.random(); i++) {
        Response rs = target("/v1.0/infrastructures").request(Constants.INDIGOMIMETYPE)
                .post(Entity.entity(TestData.createInfrastructure(), Constants.INDIGOMIMETYPE));
        infras.add(rs.readEntity(Infrastructure.class).getId());
    }

    apps = new LinkedList<>();
    for (int i = 0; i < 1 + (int) TestData.MAX_ENTITIES_IN_LIST * Math.random(); i++) {
        Application app = TestData.createApplication();
        app.setInfrastructureIds(infras);
        Response rs = target("/v1.0/applications").request(Constants.INDIGOMIMETYPE)
                .post(Entity.entity(app, Constants.INDIGOMIMETYPE));
        apps.add(rs.readEntity(Application.class).getId());
    }
}

---

From source file:com.seleniumtests.browserfactory.mobile.LocalAppiumLauncher.java

public LocalAppiumLauncher(String logDirectory) {

    appiumPort = 4723 + Math.round(Math.random() * 1000);
    if (logDirectory != null) {
        new File(logDirectory).mkdirs();
        if (new File(logDirectory).isDirectory()) {
            logFile = Paths.get(logDirectory, String.format("appium-%d.log", appiumPort)).toString();
        }//from  w w  w  .  j  a  v a2s. com
    }

    checkInstallation();
    generateOptions();

}

---

From source file:com.ciphertool.sentencebuilder.dao.BasicWordMapDao.java

@Override
public Word findRandomWordByPartOfSpeech(PartOfSpeechType pos) {
    ArrayList<Word> wordList = partOfSpeechWordMap.get(pos);

    int randomIndex = (int) (Math.random() * wordList.size());

    return wordList.get(randomIndex);
}

---

From source file:com.sm.store.TestStoreCases.java

public long genLong(long seed) {
    if (seed < Integer.MAX_VALUE)
        return random.nextInt((int) seed);
    else {/* w w  w .j  a v a2  s  . co m*/
        return (long) Math.random() * seed;
    }
}

---

From source file:com.pureinfo.tgirls.servlet.GetScriptServlet.java

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    String scriptType = request.getParameter("scriptType");
    if (StringUtils.isEmpty(scriptType)) {
        response.sendError(HttpServletResponse.SC_BAD_REQUEST);
        return;//from w w  w .j a v  a  2 s . c o m
    }

    String location = null;
    String userId = null;
    String photoId = null;
    ScriptType st = null;//

    try {
        st = ScriptType.getScriptType(Integer.parseInt(scriptType));
    } catch (Exception e) {
    }

    switch (st) {
    case UserInfo:
        userId = request.getParameter("utid");
        location = ScriptManager.mapUserInfoScriptLocation(userId);
        break;
    case UserUpload:
        userId = request.getParameter("utid");
        location = ScriptManager.mapUserUploadScriptLocation(userId);
        break;
    case UserBuy:
        userId = request.getParameter("utid");
        location = ScriptManager.mapUserBuyScriptLocation(userId);
        break;
    case Pic:
        photoId = request.getParameter("picId");
        location = ScriptManager.mapPhotoScriptLocation(photoId);
        break;

    default:
        response.sendError(HttpServletResponse.SC_BAD_REQUEST);
        return;
    }

    if (StringUtils.isEmpty(location)) {
        response.sendError(HttpServletResponse.SC_BAD_REQUEST);
        return;
    }

    location += "?version=" + Math.random();
    logger.debug("return script:" + location);

    response.setHeader("Location", location);
    response.setHeader("Content-Encoding", "gzip");
    response.setStatus(HttpServletResponse.SC_SEE_OTHER);
    response.setHeader("Cache-Control", "no-cache"); //HTTP 1.1
    response.setHeader("Pragma", "no-cache"); //HTTP 1.0
    response.setDateHeader("Expires", -1);
    response.setDateHeader("max-age", 0);

    return;

}

---

From source file:net.solarnetwork.node.power.foobar.FoobarDatumDataSource.java

@Override
public PowerDatum readCurrentDatum() {
    // our inverter is a 1kW system, let's produce a random value between 0-1000
    int watts = (int) Math.round(Math.random() * 1000.0);

    // we'll increment our Wh reading by a random amount between 0-15, with
    // the assumption we will read samples once per minute
    long wattHours = wattHourReading.addAndGet(Math.round(Math.random() * 15.0));

    PowerDatum datum = new PowerDatum();
    datum.setCreated(new Date());
    datum.setWatts(watts);// ww  w .j  a  v  a 2  s  .c  o m
    datum.setWattHourReading(wattHours);
    datum.setSourceId(sourceId);
    postDatumCapturedEvent(datum, PowerDatum.class);
    return datum;
}

---

From source file:it.infn.ct.futuregateway.apiserver.v1.TaskServiceIT.java

/**
 * Create applications and infrastructures to associate the
 * tasks with./*  w w  w . j a v  a 2 s  . com*/
 */
@Before
public final void prepareApplication() {
    infras = new LinkedList<>();
    for (int i = 0; i < 1 + (int) TestData.MAX_ENTITIES_IN_LIST * Math.random(); i++) {
        Entity<Infrastructure> infraEntity = Entity.entity(TestData.createInfrastructure(),
                Constants.INDIGOMIMETYPE);
        Response rs = target("/v1.0/infrastructures").request(Constants.INDIGOMIMETYPE).post(infraEntity);
        infras.add(rs.readEntity(Infrastructure.class).getId());
    }

    apps = new LinkedList<>();
    for (int i = 0; i < 1 + (int) TestData.MAX_ENTITIES_IN_LIST * Math.random(); i++) {
        Application app = TestData.createApplication();
        app.setInfrastructureIds(infras);
        Entity<Application> appEntity = Entity.entity(app, Constants.INDIGOMIMETYPE);
        Response rs = target("/v1.0/applications").request(Constants.INDIGOMIMETYPE).post(appEntity);
        apps.add(rs.readEntity(Application.class).getId());
    }
}

---

From source file:org.jfree.chart.demo.XYBlockChartDemo2.java

private static XYZDataset createDataset() {
    double ad[] = new double[2400];
    double ad1[] = new double[2400];
    double ad2[] = new double[2400];
    Object obj = new Day();
    for (int i = 0; i < 100; i++) {
        double d = 1.0D;
        for (int j = 0; j < 24; j++) {
            if (Math.random() < 0.10000000000000001D)
                d = Math.random() * 4D;
            ad[i * 24 + j] = ((RegularTimePeriod) (obj)).getFirstMillisecond();
            ad1[i * 24 + j] = j;//from   w w w  .  j av a 2s. c o  m
            ad2[i * 24 + j] = d;
        }

        obj = ((RegularTimePeriod) (obj)).next();
    }

    DefaultXYZDataset defaultxyzdataset = new DefaultXYZDataset();
    defaultxyzdataset.addSeries("Series 1", new double[][] { ad, ad1, ad2 });
    return defaultxyzdataset;
}

---

From source file:com.c123.billbuddy.client.UserFeeder.java

@PostConstruct
public void init() throws Exception {
    log.info("Starting User Feeder");

    Integer userAccountId = 1;//from  w  w  w . ja  v a  2 s  . co  m

    for (String u : userList) {

        User foundUser = gigaSpace.readById(User.class, userAccountId);

        if (foundUser == null) {
            User user = new User();
            user.setName(u);

            Double balance = (Double.valueOf(Math.random() * 10000));
            user.setBalance(Math.round(balance * 100.0) / 100.0);

            Double creditLimit = Math.random() * 10000;
            creditLimit = creditLimit - (creditLimit % 1000);
            creditLimit = Math.round(creditLimit * 100.0) / 100.0;

            user.setCreditLimit(Double.valueOf(-(creditLimit)));
            user.setStatus(AccountStatus.ACTIVE);
            user.setUserAccountId(userAccountId);

            Address tempAddress = new Address();
            tempAddress.setCountry(CountryNames.values()[new Random().nextInt(CountryNames.values().length)]);
            tempAddress.setCity("123Completed.com");
            tempAddress.setState("GIGASPACES");
            tempAddress.setStreet("Here and There");
            tempAddress.setZipCode(new Random().nextInt());

            user.setAddress(tempAddress);

            // Writing the new user to the space
            gigaSpace.write(user);
            log.info(String.format("Added User object with name '%s'", user.getName()));
        }
        userAccountId++;
    }

    log.info("Stopping User Feeder");
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »