Example usage for java.util Random nextInt

Introduction

In this page you can find the example usage for java.util Random nextInt.

Prototype

public int nextInt(int bound) 

Source Link

Document

Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.

Usage

From source file:com.gst.common.Utils.java

public static String randomStringGenerator(final String prefix, final int len, final String sourceSetString) {
    final int lengthOfSource = sourceSetString.length();
    final Random rnd = new Random();
    final StringBuilder sb = new StringBuilder(len);
    for (int i = 0; i < len; i++) {
        sb.append((sourceSetString).charAt(rnd.nextInt(lengthOfSource)));
    }//from   ww  w  .j a  v  a  2s  .c  o m
    return (prefix + (sb.toString()));
}

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From source file:com.ibm.watson.movieapp.dialog.fvt.config.Utils.java

/**
 * getRandomSample// w  w  w.  j  a  va  2  s . c o m
 * @param num - number of questions
 * @param jsonFile - jsonfile to read
 * @param chat - chat type question
 * @return
 */
public static ArrayList<BaseQuestion> getRandomSample(int num, String jsonFile, boolean chat) {

    ArrayList<BaseQuestion> questions = new ArrayList<BaseQuestion>();
    ArrayList<BaseQuestion> list;
    int index;

    if (chat) {
        list = returnChatList(jsonFile);
    } else {
        list = returnMovieList(jsonFile);
    }

    //if the number of questions requested is greater then the number of questions reassign
    if (num > list.size()) {
        num = list.size();
    }

    //get questions from JSON file
    Random random = new Random();
    while (num > 0) {
        index = random.nextInt(list.size() - 1);
        questions.add(list.get(index));
        num--;
    }

    return questions;
}

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From source file:crow.weibo.util.WeiboUtil.java

/**
 * Just a simple implementation of a random number between 123400 and
 * 9999999/*from  w  w w  .j  a  v  a2s  . c  o  m*/
 * 
 * @return
 */
public static String generateNonce() {
    Random random = new Random();
    return String.valueOf(random.nextInt(9876599) + 123400);
}

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From source file:audio.cords.old.RegressionDemo.java

private static XYSeriesCollection getTestData() {
    Random rg = new Random();
    XYSeriesCollection data = new XYSeriesCollection();
    for (int i = 1; i <= 3; i++) {
        XYSeries series = new XYSeries("Series " + i);
        double a = rg.nextDouble() - .5;
        int b = rg.nextInt(20) - 10;
        for (int j = 1; j <= 20; j++) {
            double x = j + (rg.nextDouble() - .5);
            double y = a * j + b + (rg.nextDouble() - .5) * 2;
            series.add(x, y);/*from ww w.j  av a2 s .c  o  m*/
        }
        data.addSeries(series);
    }
    return data;
}

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From source file:biz.c24.io.spring.integration.samples.fpml.FpmlGenerator.java

private static TradeConfirmed randomizeFpML(TradeConfirmed tradeConfirmed) throws CloneNotSupportedException {
    ISO8601DateTime creationDate = new ISO8601DateTime(new Date());
    ISO8601Date tradeDate = new ISO8601Date(new GregorianCalendar(2011, Calendar.JULY, 5).getTime());
    ISO8601Date expiryDate = new ISO8601Date(new GregorianCalendar(2012, Calendar.JANUARY, 5).getTime());
    ISO8601Date settlementDate = new ISO8601Date(new GregorianCalendar(2011, Calendar.JULY, 7).getTime());
    ISO8601Date valueDate = new ISO8601Date(new GregorianCalendar(2012, Calendar.JANUARY, 9).getTime());

    Random random = new Random();

    BigDecimal putAmount = new BigDecimal((1 + random.nextInt(999)) * 100000.);
    BigDecimal callAmount = new BigDecimal((1 + random.nextInt(999)) * 100000.);
    BigDecimal fxRate = callAmount.divide(putAmount, 8, RoundingMode.HALF_EVEN).setScale(5,
            BigDecimal.ROUND_HALF_UP);
    BigDecimal premiumValue = new BigDecimal(0.001).setScale(5, BigDecimal.ROUND_HALF_UP);
    BigDecimal premiumAmount = callAmount.multiply(premiumValue).setScale(2, BigDecimal.ROUND_HALF_UP);

    String sendTo = "SendTo" + random.nextInt(999999);
    String sentBy = "SentBy" + random.nextInt(999999);
    String msgId = "Msg" + random.nextInt(999999);
    String conversationId = "Conv" + random.nextInt(999999);
    String tradeId1 = "ID1:" + random.nextInt(999999);
    String tradeId2 = "ID2:" + random.nextInt(999999);

    // Set the header
    NotificationMessageHeader header = tradeConfirmed.getHeader();
    header.getMessageHeadermodel().setCreationTimestamp(creationDate);
    header.getConversationId().setValue(conversationId);
    header.getMessageId().setValue(msgId);
    header.getMessageHeadermodel().getSentBy().setValue(sentBy);
    header.getMessageHeadermodel().getSendTo()[0].setValue(sendTo);

    // Set the TradeHeader
    TradeHeader tradeHeader = tradeConfirmed.getTrade().getTradeHeader();
    tradeHeader.getPartyTradeIdentifier()[0].getTradeIdentifierSG1()[0].getTradeId().setValue(tradeId1);
    tradeHeader.getPartyTradeIdentifier()[1].getTradeIdentifierSG1()[0].getTradeId().setValue(tradeId2);
    tradeHeader.getTradeDate().setValue(tradeDate);

    FxOptionLeg fxOptionLeg = (FxOptionLeg) tradeConfirmed.getTrade().getProduct();
    fxOptionLeg.getExpiryDateTime().setExpiryDate(expiryDate);

    FxOptionPremium optionPremium = fxOptionLeg.getFxOptionPremium()[0];
    optionPremium.getPremiumAmount().setAmount(premiumAmount);
    optionPremium.setPremiumSettlementDate(settlementDate);
    SettlementInstruction settlementInstruction = optionPremium.getSettlementInformation()
            .getSettlementInstruction();
    settlementInstruction.getCorrespondentInformation().getRoutingIdentificationmodel().getRoutingIds()
            .getRoutingId()[0].setValue(sendTo);
    settlementInstruction.getBeneficiary().getRoutingIdentificationmodel().getRoutingIds().getRoutingId()[0]
            .setValue(sentBy);/* www .  ja va 2  s .  com*/
    optionPremium.getPremiumQuote().setPremiumValue(premiumValue);
    fxOptionLeg.setValueDate(valueDate);

    fxOptionLeg.getPutCurrencyAmount().getCurrency().setValue("AUD");
    fxOptionLeg.getPutCurrencyAmount().setAmount(putAmount);

    fxOptionLeg.getPutCurrencyAmount().getCurrency().setValue("USD");
    fxOptionLeg.getCallCurrencyAmount().setAmount(callAmount);

    fxOptionLeg.getFxStrikePrice().setRate(fxRate);

    fxOptionLeg.getQuotedAs().getOptionOnCurrency().setValue("AUD");
    fxOptionLeg.getQuotedAs().getFaceOnCurrency().setValue("USD");
    fxOptionLeg.getQuotedAs().getQuotedTenor().setPeriod("M");
    fxOptionLeg.getQuotedAs().getQuotedTenor().setPeriodMultiplier(new BigInteger("6"));

    tradeConfirmed.getParty()[0].getPartyId()[0].setValue(sendTo);
    tradeConfirmed.getParty()[1].getPartyId()[0].setValue(sentBy);

    return (TradeConfirmed) tradeConfirmed.cloneDeep();
}

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From source file:com.inclouds.hbase.utils.RegionServerPoker.java

/**
  * Selects random region/*from w  w w  .  j a  v  a  2  s .com*/
  * @param set
  * @return
  */
private static HRegionInfo select(Set<HRegionInfo> set) {
    Random r = new Random();
    int i = r.nextInt(set.size());
    return (HRegionInfo) set.toArray()[i];

}

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From source file:Main.java

public static <T> ArrayList<T> rand(ArrayList<T> population, int nSamplesNeeded) {
    Random r = new Random();
    ArrayList<T> ret = new ArrayList<T>();

    if (nSamplesNeeded > population.size() / 2) {
        ArrayList<T> original = new ArrayList<T>();
        original = population;/*from   w w w .j ava2 s  .  c o  m*/

        while (nSamplesNeeded > 0) {
            int rand = r.nextInt(original.size());
            if (rand < nSamplesNeeded) {
                ret.add(original.get(rand));
                original.remove(rand);
                nSamplesNeeded--;
            }
        }
        original.clear();
    } else
        ret = shuffle(population, nSamplesNeeded);

    return ret;
}

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From source file:com.pasi.pdfbox.Main.java

private static PatientBloodPressureReport createPatientBloodPressureReport() {
    PatientBloodPressureReport report = new PatientBloodPressureReport();
    report.setPatientName("Bean Zeng");
    report.setDuration(3);//from w w  w. j a v  a2  s. co  m
    report.setReportDate(new Date());
    report.setComments("N/A");
    report.setDesiredSystolic(80);
    report.setDesiredDiastolic(120);
    List<BloodPressureRecord> records = new ArrayList<BloodPressureRecord>();
    Random random = new Random();
    for (int i = 0; i < 10; i++) {
        BloodPressureRecord record = new BloodPressureRecord();
        record.setDate(new Date(System.currentTimeMillis() - (10 - i) * 24 * 60 * 60 * 1000));
        record.setSystolic(80 + random.nextInt(10));
        record.setDiastolic(120 + random.nextInt(20));
        record.setPulse(75 + random.nextInt(10));
        record.setSource("Source #" + i);
        records.add(record);
    }
    report.setBloodPressureRecords(records);
    return report;
}

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From source file:com.jkoolcloud.tnt4j.streams.custom.kafka.interceptors.InterceptorsTest.java

private static void produce(Producer<String, String> producer, String topic, int eventCount) {
    Random rnd = new Random();

    for (int ei = 0; ei < eventCount; ei++) {
        long runtime = System.currentTimeMillis();
        String ip = "192.168.2." + rnd.nextInt(255); // NON-NLS
        String msg = runtime + ",www.example.com," + ip + "," + (ei + 1)
                + eventsPayload[ei / eventsPayload.length];// NON-NLS
        ProducerRecord<String, String> data = new ProducerRecord<>(topic, ip, msg);
        producer.send(data);//from w  ww  .  j a  v a 2  s.  co m
        LOGGER.log(OpLevel.INFO, "Producing Kafka message: seqNumber={2} msg={1}", producer.hashCode(), // NON-NLS
                data, ei);
        if (ei % 5 == 0) {
            try {
                Thread.sleep((long) (1000 + 2000 * Math.random()));
            } catch (InterruptedException exc) {
            }
        }
    }

    producer.close();
}

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From source file:ezbake.locksmith.service.EzLocksmithHandlerTest.java

@BeforeClass
public static void init() throws Exception {
    BaseTest.init();/*from w ww  .  j  a v  a 2s.c o m*/

    Random portChooser = new Random();
    int port = portChooser.nextInt((23999 - 22999) + 1) + 22999;
    serverPool = new ThriftServerPool(ezConfiguration, port);
    serverPool.startCommonService(new EzLocksmithHandler(), SERVICE_NAME, "gibberish1234");
    clientPool = new ThriftClientPool(ezConfiguration);

    mongo = new MongoDBService(ezConfiguration);
    EzBakeApplicationConfigurationHelper appConfig = new EzBakeApplicationConfigurationHelper(ezConfiguration);
    rsaTable = String.format("lock_smith_%s_%s_%s", appConfig.getApplicationName(), appConfig.getServiceName(),
            "rsa_keys");
    aesTable = String.format("lock_smith_%s_%s_%s", appConfig.getApplicationName(), appConfig.getServiceName(),
            "aes_keys");
}

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