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.ideabase.repository.test.TestCaseRepositoryHelper.java

public static List<Integer> fixCreateItemsWithRandomName(final RepositoryService pRepositoryService,
        final int pNumberOfItems) {
    final List<Integer> itemIds = new ArrayList<Integer>();
    final String dummyName = String.valueOf((System.currentTimeMillis() + Math.random())).replace(".", "");
    final String dummyEmail = String.valueOf((System.currentTimeMillis() + Math.random()) + "@somewherein.net")
            .replace(".", "");
    for (int i = 0; i < pNumberOfItems; i++) {
        final GenericItem item = new GenericItem();
        item.addField("vendor", "test" + i);
        item.addField("name", i + dummyName);
        item.addField("email", i + dummyEmail);
        item.addField("currentTime", String.valueOf(System.currentTimeMillis()));
        item.setTitle(i + dummyName);//from w w w . j  ava  2 s  .com
        item.setCreatedOn(new Timestamp(System.currentTimeMillis()));
        item.setLastUpdatedOn(item.getCreatedOn());
        itemIds.add(pRepositoryService.save(item));
    }
    return itemIds;
}

From source file:com.ciphertool.genetics.algorithms.crossover.ConservativeCentromereCrossoverAlgorithm.java

/**
 * This crossover algorithm finds all the points where both parent
 * Chromosomes can safely be split in half without splitting a Gene, and
 * then picks one of those at random as the centromere for crossover.
 * /*  w w  w  .j  ava2 s  . c o m*/
 * @see com.ciphertool.genetics.algorithms.crossover.zodiacengine.genetic.CrossoverAlgorithm#crossover(com.ciphertool.genetics.entities.zodiacengine.genetic.Chromosome,
 *      com.ciphertool.genetics.entities.zodiacengine.genetic.Chromosome)
 */
@Override
public List<Chromosome> crossover(Chromosome parentA, Chromosome parentB) {
    List<Integer> potentialCentromeres = findPotentialCentromeres(parentA, parentB);

    /*
     * Casting to int will truncate the number, giving us an index we can
     * safely use against lists.
     */
    int centromere = potentialCentromeres.get((int) (Math.random() * potentialCentromeres.size()));

    List<Chromosome> children = new ArrayList<Chromosome>();

    Chromosome firstChild = performCrossover(parentA, parentB, centromere);
    // The chromosome will be null if it's identical to one of its parents
    if (firstChild != null) {
        children.add(firstChild);
        parentA.increaseNumberOfChildren();
        parentB.increaseNumberOfChildren();
    }

    return children;
}

From source file:blue.soundObject.jmask.Random.java

public double getValue(double time) {
    double range = max - min;

    return min + (range * Math.random());
}

From source file:classifiers.ComplexClassifierZufall.java

public ComplexClassifierZufall(Instances inst, int anzahl) {
    super(inst);//from   w w w  . j  a v a 2  s . c om
    Datenbank = new Instances(super.getinst());
    this.vernetzung = (int) (Math.random() * 101);
    Model = new GraphMitAngabeVernetzungsgrad(inst, vernetzung);
    Model.strukturiereGraph();

    list = new ArrayList<>();
    Classparam = new double[inst.numInstances()];
    this.anzahldurchlauf = anzahl;
    trainergebnisse = new double[anzahldurchlauf][2];
    testergebnisse = new double[anzahldurchlauf][2];
    Modelergebnisse = new double[1][2];
    validierungsergebnisse = new double[1][2];
    struct = new BayesNetz(inst, Model);

}

From source file:iqq.im.action.GetCaptchaImageAction.java

@Override
protected QQHttpRequest onBuildRequest() throws QQException, JSONException {
    QQHttpRequest req = createHttpRequest("GET", QQConstants.URL_GET_CAPTCHA);
    req.addGetValue("aid", QQConstants.APPID);
    req.addGetValue("r", Math.random() + "");
    req.addGetValue("uin", uin + "");
    return req;/* w  ww. java 2  s  .  c om*/
}

From source file:org.openbaton.nfvo.core.core.NetworkManagement.java

@Override
public Network add(VimInstance vimInstance, Network network) throws VimException, PluginException {
    log.info("Creating network " + network.getName() + " on vim " + vimInstance.getName());
    org.openbaton.nfvo.vim_interfaces.network_management.NetworkManagement vim;
    vim = vimBroker.getVim(vimInstance.getType());
    //Define Network if values are null or empty
    if (network.getName() == null || network.getName().isEmpty())
        network.setName(IdGenerator.createUUID());
    if (network.getSubnets().isEmpty()) {
        //Define Subnet
        Subnet subnet = new Subnet();
        subnet.setName(network.getName() + "_subnet");
        subnet.setCidr("192.168." + (int) (Math.random() * 255) + ".0/24");
        //Define list of Subnets for Network
        Set<Subnet> subnets = new HashSet<>();
        subnets.add(subnet);//from   w ww. j av a 2 s. c o m
        network.setSubnets(subnets);
    }
    //Create Network on cloud environment
    network = vim.add(vimInstance, network);
    //Create Network in NetworkRepository
    networkRepository.save(network);
    //Add network to VimInstance
    vimInstance.getNetworks().add(network);
    log.info("Created Network " + network.getName());
    log.debug("Network details: " + network);
    return network;
}

From source file:ar.com.zauber.commons.message.impl.mail.BalancerNotificationStrategy.java

/** @see NotificationStrategy#execute(NotificationAddress[], Message) */
@Override//from   w ww.j  a  v a  2 s.c o m
public final void execute(final NotificationAddress[] addresses, final Message message) {

    if (ratio == 0.0) {
        logger.debug("Sending using strategy2");
        strategy2.execute(addresses, message);
    } else if (ratio == 1.0) {
        logger.debug("Sending using strategy1");
        strategy1.execute(addresses, message);
    } else {
        if (Math.random() > ratio) {
            logger.debug("Sending using strategy2");
            strategy2.execute(addresses, message);
        } else {
            logger.debug("Sending using strategy1");
            strategy1.execute(addresses, message);
        }
    }
}

From source file:org.jfree.chart.demo.CloneTest1.java

public void actionPerformed(ActionEvent actionevent) {
    if (actionevent.getActionCommand().equals("ADD_DATA")) {
        double d = 0.90000000000000002D + 0.20000000000000001D * Math.random();
        lastValue = lastValue * d;//w w  w. ja v a 2  s . c o m
        Millisecond millisecond = new Millisecond();
        System.out.println("Now = " + millisecond.toString());
        series.add(new Millisecond(), lastValue);
    }
}

From source file:eu.ggnet.dwoss.rights.assist.gen.RightsGeneratorOperation.java

/**
 * Create the given amount of operators and personas and create a Addentional Operator with the Username "Adminuser" und clear text Password Test and All
 * Rights./*from  w ww.  j  a  v  a 2 s  .c o m*/
 * <p>
 * .* @param countOfOperator
 * <p>
 * @param countOfOperator
 * @param countOfPersona
 */
public void make(int countOfOperator, int countOfPersona) {
    List<Persona> personas = new ArrayList<>();
    for (int i = 0; i < countOfPersona; i++) {
        Persona persona = new Persona();
        persona.setName("Persona " + i);
        persona.addAll(getRandomRights());
        em.persist(persona);
        personas.add(persona);
    }
    for (int j = 0; j < countOfOperator; j++) {
        Operator operator = new Operator();
        for (AtomicRight atomicRight : getRandomRights()) {
            operator.add(atomicRight);
        }
        operator.setUsername("User " + j);
        int till = (int) (Math.random() * countOfPersona - 1);
        for (Persona persona : personas.subList(0, till)) {
            operator.add(persona);
        }
        operator.setSalt(RandomStringUtils.randomAlphanumeric(6).getBytes());
        operator.setPassword(AuthenticationBean
                .hashPassword(RandomStringUtils.randomAlphanumeric(15).toCharArray(), operator.getSalt()));
        operator.setQuickLoginKey((int) (Math.random() * 999));
        em.persist(operator);
    }
}

From source file:com.balero.models.TestDAO.java

@Transactional
public void add() {
    Session session = sessionFactory.openSession();
    Test test = new Test();
    Double n = Math.random();
    test.setName("user_" + n.toString());
    test.setEmail("user@" + n.toString());
    session.save(test);/*from w ww.  j  a  v  a 2 s .  c om*/
    session.flush();
    session.close();
}