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.mgmtp.perfload.core.client.util.BetaDistWaitingTimeStrategy.java

@Override
public long calculateWaitingTime() {
    BetaDistribution betaDist = new BetaDistribution(betaDistParamA, betaDistParamB);
    double probability = betaDist.cumulativeProbability(Math.random());
    return calculateNormedValue(probability);
}

From source file:com.mycompany.internalservicecontrollerbatch.ServerCall.java

@Override
public void run() {
    String url = list.getCallToPerform();
    try {//from  w  ww .  j  a  va  2s .  co  m
        HttpClient client = HttpClientBuilder.create().build();
        if (url != null) {

            //HttpPost post = new HttpPost(url);
            //StringEntity entity = new StringEntity("");
            //post.setEntity(entity);

            HttpGet request = new HttpGet(url);
            long start = System.currentTimeMillis();
            HttpResponse response = client.execute(request);
            long end = System.currentTimeMillis();
            //System.out.println("Response Code : "+ response.getStatusLine().getStatusCode() + " index: " +index + " start: " + start + " end: " +end+ " thread name: "+ Thread.currentThread().getName());
            double r = Math.random();
            long wait = Math.round(r * 250);
            HttpEntity entity = response.getEntity();
            String responseString = EntityUtils.toString(entity, "UTF-8");
            String printout = "Server Call: " + url + " Response Code : "
                    + response.getStatusLine().getStatusCode() + " Response content: " + responseString;
            list.resolveCall(printout, true);
            Thread.sleep(wait);
        }
    } catch (Exception ex) {
        Logger.getLogger(ServerCall.class.getName()).log(Level.SEVERE, null, ex);
        list.resolveCall("ERROR PERFORMING: " + url, false);
    }

}

From source file:com.splout.db.dnode.TestFetcher.java

@Test
public void testThrottling() throws InterruptedException {
    double bytesPerSec = 1000;
    Throttler throttler = new Throttler(bytesPerSec);
    long startTime = System.currentTimeMillis();

    int bytesConsumed = 0;

    for (int i = 0; i < 10; i++) {
        int bytes = (int) (Math.random() * 1000);
        bytesConsumed += bytes;//  w  ww .j  a  v a 2s . c  o  m
        throttler.incrementAndThrottle(bytes);
    }

    long endTime = System.currentTimeMillis();
    double secs = (endTime - startTime) / (double) 1000;
    double avgBytesPerSec = bytesConsumed / secs;

    assertEquals(bytesPerSec, avgBytesPerSec, 5.0); // + - 5
}

From source file:com.appzone.sim.services.handlers.SendMoServiceHandler.java

@Override
protected String doProcess(HttpServletRequest request) {

    String address = request.getParameter(KEY_ADDRESS);
    String message = request.getParameter(KEY_MESSAGE);
    String correlator = "" + ((int) (Math.random() * 10000000000000L));

    try {/*from w w w  .  ja  va2s .  co  m*/
        String queryString = String.format("version=1.0&address=%s&message=%s&correlator=%s", address,
                URLEncoder.encode(message, "UTF-8"), URLEncoder.encode(correlator, "UTF-8"));

        logger.info("sending MO request as: {}", queryString);
        String response = http.excutePost(application.getUrl(), queryString);
        logger.debug("getting response as: {}", response);

        JSONObject json = new JSONObject();
        json.put(ServiceHandler.JSON_KEY_RESULT, response);
        return json.toJSONString();

    } catch (Exception e) {

        logger.error("Error while sending http request", e);

        JSONObject json = new JSONObject();
        json.put(ServiceHandler.JSON_KEY_ERROR, e.getMessage());
        return json.toJSONString();
    }

}

From source file:com.victor.fishhub.service.ratioalgo.FishRatioImpl.java

private Integer getRatioValue(H3PeriodWeather h3, Fish fish) {
    Integer ratio = null;/* w w w  .  j  a  v a  2s .  c o  m*/
    if (h3 != null && fish != null) {
        ratio = (int) ((h3.getTemperature() / 25) * 5 + Math.random() * 5);
        ratio = ratio > 10 ? 10 : ratio;
    }
    return ratio;
}

From source file:ar.org.neuroph.core.Weight.java

/**
 * Creates an instance of connection weight with random weight value in
 * range [0..1]//  ww  w. j  a v  a2s  .  c  o m
 */
public Weight() {
    this.value = Math.random() - 0.5d;
    this.weightChange = 0;
}

From source file:org.eclipse.swt.examples.graphics.IntroTab.java

@Override
public void next(int width, int height) {
    x += incX;/*  w w  w .  jav a  2s. co m*/
    y += incY;
    float random = (float) Math.random();
    if (x + textWidth > width) {
        x = width - textWidth;
        incX = random * -width / 16 - 1;
    }
    if (x < 0) {
        x = 0;
        incX = random * width / 16 + 1;
    }
    if (y + textHeight > height) {
        y = (height - textHeight) - 2;
        incY = random * -height / 16 - 1;
    }
    if (y < 0) {
        y = 0;
        incY = random * height / 16 + 1;
    }
}

From source file:ByteFIFOTest.java

private void src() {
    try {/*from   www .  ja v a  2s .  c o  m*/
        boolean justAddOne = true;
        int count = 0;

        while (count < srcData.length) {
            if (!justAddOne) {
                int writeSize = (int) (40.0 * Math.random());
                writeSize = Math.min(writeSize, srcData.length - count);

                byte[] buf = new byte[writeSize];
                System.arraycopy(srcData, count, buf, 0, writeSize);
                fifo.add(buf);
                count += writeSize;

                System.out.println("just added " + writeSize + " bytes");
            } else {
                fifo.add(srcData[count]);
                count++;

                System.out.println("just added exactly 1 byte");
            }

            justAddOne = !justAddOne;
        }
    } catch (InterruptedException x) {
        x.printStackTrace();
    }
}

From source file:edu.umass.cs.reconfiguration.reconfigurationpackets.StopEpoch.java

/**
 * @param initiator/*from w w w.j  av a  2s. c o  m*/
 * @param name
 * @param epochNumber
 * @param getFinalState
 * @param executeStop 
 */
public StopEpoch(NodeIDType initiator, String name, int epochNumber, boolean getFinalState,
        boolean executeStop) {
    super(initiator, ReconfigurationPacket.PacketType.STOP_EPOCH, name, epochNumber);
    this.getFinalState = getFinalState;
    this.requestID = (long) (Math.random() * Long.MAX_VALUE);
    this.executeStop = executeStop;
}

From source file:com.commenterteam.commenter.controller.AppController.java

@RequestMapping("/place/{placeId}/user/{userId}")
public String indexHandler(Model model, @PathVariable("placeId") String placeId,
        @PathVariable("userId") String userId) {
    Place place = placeService.getPlaceById(Integer.valueOf(placeId));
    model.addAttribute("place", place);
    int approve = (int) (Math.random() * 100);
    model.addAttribute("approve", approve);
    return "index";
}