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:hu.vpmedia.media.red5.bwcheck.BandwidthDetection.java

public void calculateClientBw(IConnection p_client) {

    for (int i = 0; i < 1200; i++) {
        payload[i] = Math.random();
    }//from w w w.ja  v  a 2  s.  com

    p_client.setAttribute("payload", payload);

    for (int i = 0; i < 12000; i++) {
        payload_1[i] = Math.random();
    }

    p_client.setAttribute("payload_1", payload_1);

    for (int i = 0; i < 12000; i++) {
        payload_2[i] = Math.random();
    }

    p_client.setAttribute("payload_2", payload_2);

    final IStreamCapableConnection beginningStats = this.getStats();
    final Long start = new Long(System.nanoTime() / 1000000); //new Long(System.currentTimeMillis());

    this.client = p_client;
    beginningValues = new HashMap<String, Long>();
    beginningValues.put("b_down", beginningStats.getWrittenBytes());
    beginningValues.put("b_up", beginningStats.getReadBytes());
    beginningValues.put("time", start);

    this.pakSent.add(start);
    this.sent++;
    log.info("Starting bandwidth check at " + start);
    this.callBWCheck("");

}

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From source file:org.openhie.openempi.service.MailEngineTest.java

public void testSend() throws Exception {
    // mock smtp server
    Wiser wiser = new Wiser();
    // set the port to a random value so there's no conflicts between tests
    int port = 2525 + (int) (Math.random() * 100);
    mailSender.setPort(port);/*from w w  w  .  ja v a 2 s  .c  om*/
    wiser.setPort(port);
    wiser.start();

    Date dte = new Date();
    this.mailMessage.setTo("foo@bar.com");
    String emailSubject = "grepster testSend: " + dte;
    String emailBody = "Body of the grepster testSend message sent at: " + dte;
    this.mailMessage.setSubject(emailSubject);
    this.mailMessage.setText(emailBody);
    this.mailEngine.send(this.mailMessage);

    wiser.stop();
    assertTrue(wiser.getMessages().size() == 1);
    WiserMessage wm = wiser.getMessages().get(0);
    assertEquals(emailSubject, wm.getMimeMessage().getSubject());
    assertEquals(emailBody, wm.getMimeMessage().getContent());
}

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From source file:org.trendafilov.odesk.notifier.Main.java

public void startup() {
    ScheduledExecutorService executor = Executors.newScheduledThreadPool(2);
    executor.scheduleAtFixedRate(alertDeamon, 1, 1, TimeUnit.MINUTES);

    while (true) {
        executor.submit(newJobPooler);/*from w w  w.  ja  v  a 2  s  .  c  om*/
        int randomDelay = 3 + (int) (Math.random() * 5);
        Logger.info(String.format("Sleeping for: [%s]", randomDelay));
        try {
            Thread.sleep(randomDelay * 1000 * 60);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
    }
}

---

From source file:discovery.ExampleServer.java

public ExampleServer(CuratorFramework client, String path, String serviceName, String description)
        throws Exception {
    // in a real application, you'd have a convention of some kind for the URI layout
    UriSpec uriSpec = new UriSpec("{scheme}://foo.com:{port}");

    thisInstance = ServiceInstance.<InstanceDetails>builder().name(serviceName)
            .payload(new InstanceDetails(description)).port((int) (65535 * Math.random())) // in a real application, you'd use a common port
            .uriSpec(uriSpec).build();//w  w w  . j  a v  a 2  s . co  m

    // if you mark your payload class with @JsonRootName the provided JsonInstanceSerializer will work
    JsonInstanceSerializer<InstanceDetails> serializer = new JsonInstanceSerializer<InstanceDetails>(
            InstanceDetails.class);

    serviceDiscovery = ServiceDiscoveryBuilder.builder(InstanceDetails.class).client(client).basePath(path)
            .serializer(serializer).thisInstance(thisInstance).build();
}

---

From source file:com.almende.eve.ggdemo.HolonAgent.java

public void create(@Name("neighbours") ArrayList<String> nbs, @Name("stepSize") Integer stepSize)
        throws JSONRPCException, IOException {

    neighbours = new HashSet<String>(nbs);
    getState().put("neighbours", neighbours);

    if (stepSize > neighbours.size()) {
        stepSize = neighbours.size();//from   w  w w  . j a  v  a2  s  .c o  m
    }
    getState().put("stepSize", stepSize);

    String taskId = getScheduler().createTask(new JSONRequest("checkMerge", null), (int) Math.random() * 1500);
    System.out.println(getId() + ": schedulertask created:" + taskId + " --> " + getScheduler());
}

---

From source file:org.openmrs.web.taglib.DisplayChartTag.java

/**
 * Render graph./*from w w  w .  j  av a 2  s  .  c om*/
 *
 * @return return result code
 */
public int doStartTag() throws JspException {
    if (chart != null) {
        try {
            HttpSession session = pageContext.getSession();
            HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();

            Long time = System.currentTimeMillis();
            Double random = Math.random() * 1000.0;
            String key = "chart-" + time + "-" + session.getId() + "-" + random;
            session.setAttribute(key, chart);

            pageContext.getOut()
                    .write("<img src=\"" + request.getContextPath() + "/" + SERVLET_NAME + "?" + CHART_KEY + "="
                            + key + "&mimeType=" + PNG_MIME_TYPE + "&width=" + width + "&height=" + height
                            + "\" />");

        } catch (IOException e) {
            log.error("Unable to generate chart servlet url", e);
        }
    }

    return EVAL_BODY_BUFFERED;
}

---

From source file:org.mt4jx.components.visibleComponents.widgets.jfreechart.examples.MTJFreeChartExampleScene.java

public MTJFreeChartExampleScene(MTApplication mtApplication, String name) {
    super(mtApplication, name);
    this.setClearColor(new MTColor(0, 0, 96, 255));
    //Show touches
    this.registerGlobalInputProcessor(new CursorTracer(mtApplication, this));

    // Create Example Data
    DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    for (int i = 0; i < 10; i++) {
        dataset.addValue(10 * Math.random(), "MySeries", "T" + i);
    }/* w ww. j a v  a2  s .c om*/
    // Create a JFreeChart
    JFreeChart chart1 = ChartFactory.createLineChart("Line Chart", "x axis", "y axis", dataset,
            PlotOrientation.VERTICAL, true, true, false);
    // Put the JFreeChart into a MTJFreeChart wrapper
    MTJFreeChart mtChart1 = new MTJFreeChart(800, 600, mtApplication, chart1);

    // Create another chart
    DefaultPieDataset pds = new DefaultPieDataset();

    pds.setValue("Java", new Double(17.773));
    pds.setValue("C", new Double(15.822));
    pds.setValue("C++", new Double(8.783));
    pds.setValue("PHP", new Double(7.835));
    pds.setValue("Python", new Double(6.265));
    pds.setValue("C#", new Double(6.226));
    pds.setValue("(Visual) Basic", new Double(5.867));
    pds.setValue("Objective-C", new Double(3.011));
    pds.setValue("Perl", new Double(2.857));

    JFreeChart chart2 = ChartFactory.createPieChart3D(
            "Top 10: TIOBE Programming Community Index\nfor January 2011 (www.tiobe.com)", pds, true, true,
            Locale.GERMANY);
    PiePlot3D plot = (PiePlot3D) chart2.getPlot();
    plot.setStartAngle(290);

    MTJFreeChart mtChart2 = new MTJFreeChart(800, 600, mtApplication, chart2);
    // enable redraw of the chart when it's scaled by the user
    mtChart2.setRedrawWhenScaled(true);
    this.getCanvas().addChild(mtChart1);
    this.getCanvas().addChild(mtChart2);
    mtChart1.setPositionGlobal(new Vector3D(mtApplication.width / 2f, mtApplication.height / 2f));
    mtChart2.setPositionGlobal(new Vector3D(150 + mtApplication.width / 2f, 150 + mtApplication.height / 2f));
}

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From source file:com.microsoft.office.integration.test.FoldersTestCase.java

public void testMoveAndCopy() {
    final String name = "move and copy test" + (int) (Math.random() * 1000000);
    folder = Me.getRootFolder().getChildFolders().newFolder();
    folder.setDisplayName(name);//from   w ww . ja v  a 2  s.co  m
    IFolder copied = null;
    folder = folder.move(Me.getDrafts().getId());
    copied = folder.copy(Me.getRootFolder().getId());

    Me.getFolders().delete(folder.getId());
    if (copied != null) {
        Me.getFolders().delete(copied.getId());
    }

    Me.flush();
}

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From source file:com.codestudio.dorm.web.support.spring.upload.FileUploadSupport.java

public Attachment upload(long userId, byte[] file, String type, String uuid) {
    if (StringUtils.isBlank(type)) {
        type = DEFAULT_TYPE;/*from   w w w. j a  va 2 s  . c o  m*/
    }
    if (file == null) {
        return null;
    }

    FileOutputStream fs = null;
    InputStream is = null;
    try {
        is = new ByteArrayInputStream(file);

        String ext = ".png";
        Date now = new Date();
        String filePath = "/" + type + "/"
                + DateUtils.dateConvert2String(now, DateUtils.DATEPATTERN_YYYY_MM_DD4FILE) + "/";

        String fileName = now.getTime() + "" + ((int) (Math.random() * 10));

        File f = new File(uploadFilePath + filePath);
        if (!f.exists()) {
            f.mkdirs();
        }
        fs = new FileOutputStream(uploadFilePath + filePath + fileName + ext);
        byte[] buffer = new byte[1024 * 1024];
        int byteread = 0;
        while ((byteread = is.read(buffer)) != -1) {
            fs.write(buffer, 0, byteread);
            fs.flush();
        }

        // ???
        Attachment attachment = new Attachment();
        attachment.setSrcName(null);
        attachment.setDescName(fileName);
        attachment.setFileType(type);
        attachment.setExt(ext);
        attachment.setPath(filePath);
        attachment.setSize(file.length + 0L);
        attachment.setUserId(userId);
        attachment.setUuid(uuid);
        attachmentService.add(attachment);
        return attachment;
    } catch (Exception e) {
        logger.error("upload file error:", e);
    } finally {
        try {
            fs.close();
            is.close();
        } catch (Exception e) {
            logger.error("close file error:", e);
        }
    }
    return null;
}

---

From source file:cn.ipanel.apps.portalBackOffice.util.CommonsFiend.java

public static int getRandom(int max) {
    return (int) (Math.random() * (double) max);
}

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