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:playground.wrashid.tryouts.mess.Boxplot.java

private static BoxAndWhiskerCategoryDataset createSampleDataset() {

    final int seriesCount = 3;
    final int categoryCount = 4;
    final int entityCount = 22;

    final DefaultBoxAndWhiskerCategoryDataset dataset = new DefaultBoxAndWhiskerCategoryDataset();
    for (int i = 0; i < seriesCount; i++) {
        for (int j = 0; j < categoryCount; j++) {
            final List list = new ArrayList();
            // add some values...
            for (int k = 0; k < entityCount; k++) {
                final double value1 = 10.0 + Math.random() * 3;
                list.add(new Double(value1));
                final double value2 = 11.25 + Math.random(); // concentrate values in the middle
                list.add(new Double(value2));
            }/*www  .j  a  va  2 s .  c om*/
            dataset.add(list, "Series " + i, " Type " + j);
        }

    }

    return dataset;
}

From source file:org.hsweb.web.oauth2.service.OAuth2ClientServiceImpl.java

@Override
public String refreshSecret(String clientId) {
    String secret = MD5.encode(UUID.randomUUID().toString() + Math.random());
    int size = oAuth2ClientMapper
            .update((UpdateParam) UpdateMapParam.build().set("secret", secret).where("id", clientId));
    if (size != 1)
        throw new NotFoundException("?");
    return secret;
}

From source file:com.pinterest.terrapin.storage.HFileReaderTest.java

@BeforeClass
public static void setUp() throws Exception {
    int randomNum = (int) (Math.random() * Integer.MAX_VALUE);
    hfilePath = "/tmp/hfile-" + randomNum;
    Configuration conf = new Configuration();
    FileSystem fs = FileSystem.get(conf);
    keyValueMap = Maps.newHashMapWithExpectedSize(10000);
    errorKeys = Sets.newHashSetWithExpectedSize(2000);
    StoreFile.Writer writer = new StoreFile.WriterBuilder(conf, new CacheConfig(conf), fs, 4096)
            .withFilePath(new Path(hfilePath)).withCompression(Compression.Algorithm.NONE).build();
    // Add upto 10K values.
    for (int i = 0; i < 10000; i++) {
        byte[] key = String.format("%04d", i).getBytes();
        byte[] value = null;
        // Add a couple of empty values for testing and making sure we return them.
        if (i <= 1) {
            value = "".getBytes();
        } else {/*from www .ja  v a  2  s.  c o  m*/
            value = ("v" + (i + 1)).getBytes();
        }
        KeyValue kv = new KeyValue(key, Bytes.toBytes("cf"), Bytes.toBytes(""), value);
        writer.append(kv);
        keyValueMap.put(ByteBuffer.wrap(key), ByteBuffer.wrap(value));
        if (i >= 4000 && i < 6000) {
            errorKeys.add(ByteBuffer.wrap(key));
        }
    }
    writer.close();
    hfileReader = new TestHFileReader(fs, hfilePath, new CacheConfig(conf),
            new ExecutorServiceFuturePool(Executors.newFixedThreadPool(1)), errorKeys);
}

From source file:io.ecarf.core.cloud.task.common.DoUploadOutputLogTask.java

@Override
public void run() throws IOException {

    log.info("Uploading logs file");

    CloudService cloudService = this.getCloudService();

    if (StringUtils.isBlank(logFile)) {
        logFile = Config.getProperty(Constants.OUTPUT_FILE_KEY);
    }/*from  w  w w.j a va  2 s. c om*/

    if (StringUtils.isBlank(logFolder)) {
        logFolder = Config.getProperty(Constants.OUTPUT_FOLDER_KEY);
    }

    String instanceId = cloudService.getInstanceId();

    // get a random number just in case two instances have the same id, which is true for the coordinator
    //int random = (int) (Math.random() * 1001);
    if (StringUtils.isBlank(jobId)) {
        jobId = "_" + Integer.toString((int) (Math.random() * 1001));
    } else {
        jobId = "_" + jobId;
    }

    String newLogFile = logFolder + Constants.OUTPUT + instanceId + jobId + Constants.DOT_LOG;
    log.info("Copying output log to " + newLogFile);
    FileUtils.copyFile(logFolder + logFile, newLogFile);

    // upload the file to cloud storage
    cloudService.uploadFileToCloudStorage(newLogFile, bucket);

    log.info("Successfully uploaded logs file");
}

From source file:com.indicator_engine.graphgenerator.cewolf.PageViewCountData.java

/**
 *  Produces some random data.//from   w w w  . j  a  va2s  . co  m
 */
public Object produceDataset(Map params) throws DatasetProduceException {
    log.debug("producing data.");
    DefaultCategoryDataset dataset = new DefaultCategoryDataset() {
        /**
         * @see java.lang.Object#finalize()
         */
        protected void finalize() throws Throwable {
            super.finalize();
            log.debug(this + " finalized.");
        }
    };
    for (int series = 0; series < seriesNames.length; series++) {
        int lastY = (int) (Math.random() * 1000 + 1000);
        for (int i = 0; i < categories.length; i++) {
            final int y = lastY + (int) (Math.random() * 200 - 100);
            lastY = y;
            dataset.addValue(y, seriesNames[series], categories[i]);
        }
    }
    return dataset;
}

From source file:net.solarnetwork.node.job.RandomizedCronTriggerBean.java

@Override
public void setCronExpression(String cronExpression) throws ParseException {
    this.baseCronExpression = cronExpression;
    if (randomSecond) {
        int seconds = (int) Math.floor(Math.random() * 60);
        String newExpression = cronExpression.replaceAll("^\\s*\\d+(\\s+)", String.valueOf(seconds) + "$1");
        if (!newExpression.equals(cronExpression)) {
            log.debug("Randomized seconds of cron expression set to {}", seconds);
            cronExpression = newExpression;
        }//from   w w  w  .ja v a  2 s  .  c  om
    }
    super.setCronExpression(cronExpression);
}

From source file:com.atlassian.jira.web.action.setup.SetupProductBundleHelper.java

public void enableWebSudo() {
    final HttpClient httpClient = prepareClient();
    final PostMethod method = new PostMethod(getWebSudoUrl());

    final String token = DigestUtils
            .shaHex(String.valueOf(System.currentTimeMillis() + String.valueOf(Math.random())));
    sharedVariables.setWebSudoToken(token);

    try {//from  w  w w .  j a va  2  s .  com
        method.setParameter("webSudoToken", token);

        final int status = httpClient.executeMethod(method);
        if (status == 200) {
            saveCookies(httpClient.getState().getCookies());
        } else {
            log.warn("Problem when enabling websudo during product bundle license installation, status code: "
                    + status);
        }
    } catch (final IOException e) {
        log.warn("Problem when enabling websudo during product bundle license installation", e);
    } finally {
        method.releaseConnection();
    }
}

From source file:org.openbaton.vnfm.dummy.DummyAMQPVNFManager.java

/**
 * This operation allows creating a VNF instance.
 *
 * @param virtualNetworkFunctionRecord/*  w w w .j a va2  s  . c o  m*/
 * @param scripts
 */
@Override
public VirtualNetworkFunctionRecord instantiate(VirtualNetworkFunctionRecord virtualNetworkFunctionRecord,
        Object scripts, Map<String, Collection<VimInstance>> vimInstances) throws Exception {
    log.info("Instantiation of VirtualNetworkFunctionRecord " + virtualNetworkFunctionRecord.getName());

    // vnfmHelper.saveScriptOnEms(virtualNetworkFunctionRecord, scripts);

    log.debug("added parameter to config");
    log.debug("CONFIGURATION: " + virtualNetworkFunctionRecord.getConfigurations());
    ConfigurationParameter cp = new ConfigurationParameter();
    cp.setConfKey("new_key");
    cp.setValue("new_value");
    virtualNetworkFunctionRecord.getConfigurations().getConfigurationParameters().add(cp);

    Thread.sleep((int) (Math.random() * 5000) + 4000);

    return virtualNetworkFunctionRecord;
}

From source file:layout.BoxLayoutDemo2.java

public void populateContentPane(Container contentPane) {
    JPanel panel = new JPanel();
    panel.setLayout(new BoxLayout(panel, BoxLayout.PAGE_AXIS));

    //Create the rectangles.
    int shortSideSize = 15;
    for (int i = 0; i < NUM_COMPONENTS; i++) {
        if (sizeIsRandom) {
            shortSideSize = (int) (30.0 * Math.random()) + 30;
        } else {//w  w w . j  a va2 s  .c  o  m
            shortSideSize += 10;
        }
        bldComponent[i] = new BLDComponent(xAlignment[i], hue[i], shortSideSize, restrictSize, sizeIsRandom,
                String.valueOf(i));
        panel.add(bldComponent[i]);
    }

    //Create the instructions.
    JLabel label = new JLabel("Click a rectangle to " + "change its X alignment.");
    JCheckBox cb = new JCheckBox("Restrict maximum rectangle size.");
    cb.setSelected(restrictSize);
    cb.addItemListener(this);

    panel.setBorder(BorderFactory.createLineBorder(Color.red));

    Box box = Box.createVerticalBox();
    box.add(label);
    box.add(cb);

    contentPane.add(panel, BorderLayout.CENTER);
    contentPane.add(box, BorderLayout.PAGE_END);
}

From source file:org.jfree.chart.demo.MultipleAxisDemo4.java

private static XYDataset createDataset(String s, double d, RegularTimePeriod regulartimeperiod, int i) {
    TimeSeries timeseries = new TimeSeries(s);
    RegularTimePeriod regulartimeperiod1 = regulartimeperiod;
    double d1 = d;
    for (int j = 0; j < i; j++) {
        timeseries.add(regulartimeperiod1, d1);
        regulartimeperiod1 = regulartimeperiod1.next();
        d1 *= 1.0D + (Math.random() - 0.495D) / 10D;
    }/* w  w w  .ja v a  2s.c o m*/

    TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();
    timeseriescollection.addSeries(timeseries);
    return timeseriescollection;
}